(breatherless) new OS 4-strokes
07-18-2011, 01:42 PM
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RE: (breatherless) new OS 4-strokes
Yes, Marvel is great. Most folks are using the Marvel Air Tool Oil though since it preserves O-rings, etc. as well. Or mix it 50/50 with ATF. If you get sidetracked and don't get back to starting it up for a few years the ATF gives superior long term protection over any oils which tend to evaporate or congeal.
Ernie
Ernie
07-18-2011, 02:07 PM
#29
RE: (breatherless) new OS 4-strokes
The FSa-81 backplate has a boss where one could easily add a nipple if deemed necessary.
The engines I run with this crankcase vent arrangement I use a procedure to shut down at the end of the day. I run the engine at full throttle to get it hot. Then, run it at a high idle for a while to provide some manifold vacuum to clear the crankcase, and cut off the fuel. I crank it over to make sure all the fuel is gone and that's it.
The engines I run with this crankcase vent arrangement I use a procedure to shut down at the end of the day. I run the engine at full throttle to get it hot. Then, run it at a high idle for a while to provide some manifold vacuum to clear the crankcase, and cut off the fuel. I crank it over to make sure all the fuel is gone and that's it.
07-18-2011, 02:11 PM
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RE: (breatherless) new OS 4-strokes
Keep looking and you'll see the outboard fogging oil real cheap in some large departments where boat supplies are also sold. Usually the CRC brand.
Ernie
Ernie
07-18-2011, 03:24 PM
#31
RE: (breatherless) new OS 4-strokes
ORIGINAL: NM2K
OS Engines died with the passing of Mr. Ogawa. I have two NIB OS .55AX engines that I just can't bring myself to use. Why? They are ugly - and that is enough of a reason as far as I'm concerned. I don't doubt for a second that it is because of my age and experience. Truthfully, I'd just rather remember them the way that they were than be disappointed with how they might be. Yes, not logical or scienrific at all.
Ed Cregger
ORIGINAL: gkamysz
What failures of the Vega can be attributed to the block material? Wikipedia has a nice writeup on the Vega. There may not be many Vega rolling these days, but there are many premium makes producing quite a few vehicles using the exact same block design without issue. This just shows that being unaware of technology is the only reason to shrug off a simple change as ineffective. Do your due diligence before posting inaccurate information about a product you don't even own, because you heard about something 40 years ago.
What failures of the Vega can be attributed to the block material? Wikipedia has a nice writeup on the Vega. There may not be many Vega rolling these days, but there are many premium makes producing quite a few vehicles using the exact same block design without issue. This just shows that being unaware of technology is the only reason to shrug off a simple change as ineffective. Do your due diligence before posting inaccurate information about a product you don't even own, because you heard about something 40 years ago.
OS Engines died with the passing of Mr. Ogawa. I have two NIB OS .55AX engines that I just can't bring myself to use. Why? They are ugly - and that is enough of a reason as far as I'm concerned. I don't doubt for a second that it is because of my age and experience. Truthfully, I'd just rather remember them the way that they were than be disappointed with how they might be. Yes, not logical or scienrific at all.
Ed Cregger
HOW in the world can you evaluate an engine that you have not taken the time to runAND BY LOOKS ???? the AX series of engines are some of the most powerful engines in there class that OS has ever put out my 75 AX is more powerful than my 91 FX turns an inch bigger prop
i been flying for 20 years since the FSR series of engines use to be the most powerful OS two cycle engines there were
do yourself a big favor and put the 50 AX in something and go fly it you are in for a new pleasant surprise
BEST REGARDS TONY
07-18-2011, 04:45 PM
#32
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RE: (breatherless) new OS 4-strokes
I have the 110a OS and it is just perfect. It is in a Little Toni turning a APC 12x12.
120 MPH. I always run the engine dry, Keep hitting it with the starter at low idle
until it will not fire . Never used after run oil. Engines are fine and clean. Just do not
leave fuel in the engine.
Tim
120 MPH. I always run the engine dry, Keep hitting it with the starter at low idle
until it will not fire . Never used after run oil. Engines are fine and clean. Just do not
leave fuel in the engine.
Tim
07-18-2011, 07:17 PM
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RE: (breatherless) new OS 4-strokes
In never thought of os engines as ugly.but maybe thats one reason I dumped all my ugly 2 strokes.loud oily and blah.now as for four strokes niceeeesound.
07-19-2011, 02:05 AM
#34
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RE: (breatherless) new OS 4-strokes
ORIGINAL: tony0707
HI
HOW in the world can you evaluate an engine that you have not taken the time to runAND BY LOOKS ???? the AX series of engines are some of the most powerful engines in there class that OS has ever put out my 75 AX is more powerful than my 91 FX turns an inch bigger prop
i been flying for 20 years since the FSR series of engines use to be the most powerful OS two cycle engines there were
do yourself a big favor and put the 50 AX in something and go fly it you are in for a new pleasant surprise
BEST REGARDS TONY
ORIGINAL: NM2K
OS Engines died with the passing of Mr. Ogawa. I have two NIB OS .55AX engines that I just can't bring myself to use. Why? They are ugly - and that is enough of a reason as far as I'm concerned. I don't doubt for a second that it is because of my age and experience. Truthfully, I'd just rather remember them the way that they were than be disappointed with how they might be. Yes, not logical or scienrific at all.
Ed Cregger
ORIGINAL: gkamysz
What failures of the Vega can be attributed to the block material? Wikipedia has a nice writeup on the Vega. There may not be many Vega rolling these days, but there are many premium makes producing quite a few vehicles using the exact same block design without issue. This just shows that being unaware of technology is the only reason to shrug off a simple change as ineffective. Do your due diligence before posting inaccurate information about a product you don't even own, because you heard about something 40 years ago.
What failures of the Vega can be attributed to the block material? Wikipedia has a nice writeup on the Vega. There may not be many Vega rolling these days, but there are many premium makes producing quite a few vehicles using the exact same block design without issue. This just shows that being unaware of technology is the only reason to shrug off a simple change as ineffective. Do your due diligence before posting inaccurate information about a product you don't even own, because you heard about something 40 years ago.
OS Engines died with the passing of Mr. Ogawa. I have two NIB OS .55AX engines that I just can't bring myself to use. Why? They are ugly - and that is enough of a reason as far as I'm concerned. I don't doubt for a second that it is because of my age and experience. Truthfully, I'd just rather remember them the way that they were than be disappointed with how they might be. Yes, not logical or scienrific at all.
Ed Cregger
HOW in the world can you evaluate an engine that you have not taken the time to runAND BY LOOKS ???? the AX series of engines are some of the most powerful engines in there class that OS has ever put out my 75 AX is more powerful than my 91 FX turns an inch bigger prop
i been flying for 20 years since the FSR series of engines use to be the most powerful OS two cycle engines there were
do yourself a big favor and put the 50 AX in something and go fly it you are in for a new pleasant surprise
BEST REGARDS TONY
You are right, Tony. I cannot possibly evaluate an engine that I haven't ran. No argument. You win.
I'll take a little more pain medication and mount one of them on a Harrier 46. It should handle that model just fine.
Basically, in a roundabout sort of way, I was lamenting the loss of Mr. Ogawa and his particular "style", if you know what I mean?
Ed Cregger
07-19-2011, 04:15 AM
#35
RE: (breatherless) new OS 4-strokes
I am happy with the AX and FSII series OS engines. I see no reason why OS introduced new engine sizes other than to nearly double the price of the previous versions. Sure a 10% larger engine will produce more power. But doubling the price is absurd.
We were able to buy a new OS .70 FSII for $170
Now the new OS .81a is $370 ... The extra power is not worth the price.
If we wanted more power than a 70 four stroke, we'd go to the .91 for a mere and reasonable price of $190
But now, the new OS 95 four stroke engine is $300
I'm so glad I bought the previous series of engines. When I saw the new series being introduced, I bought enough 2-stroke .61's and .91 and four stroke .70FSII's and .91 FSII's to last me the rest of my life.
I even have several .50SX engines and they are great ... more powerful than the .46AX engine.
We were able to buy a new OS .70 FSII for $170
Now the new OS .81a is $370 ... The extra power is not worth the price.
If we wanted more power than a 70 four stroke, we'd go to the .91 for a mere and reasonable price of $190
But now, the new OS 95 four stroke engine is $300
I'm so glad I bought the previous series of engines. When I saw the new series being introduced, I bought enough 2-stroke .61's and .91 and four stroke .70FSII's and .91 FSII's to last me the rest of my life.
I even have several .50SX engines and they are great ... more powerful than the .46AX engine.
07-19-2011, 04:38 AM
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RE: (breatherless) new OS 4-strokes
OK Ed I have to ask. If the 55 is so ugly, why did you end up with 2 of them?
One thing I have noticed on RCU is the number of guys willing to do whatever they can for another enthusiast. I am sure there are a couple of us out here who would love to alleviate your eyestrain and take an engine off your hands.
I am sure they would even pay the shipping!
Seriously though find a plane where you can hide it under a cowl, if you have to, and enjoy it.
I have never used the 55 but I have two 46AX and a 35AX and I love them!
It is disappointing when a product we have grown to trust and love starts to come out with corners cut and the product cheapened. For my money OS is still one of the better investments out there. I am not trying to denegrate any other manufacturer by the way. I think all of the companies have there lemon and they all have there jewels too.
I am shopping for a four stroke for my Astro Hog and OS is at the top of my list.
Here is hoping for many more good years for them.
Cheers
Gord
One thing I have noticed on RCU is the number of guys willing to do whatever they can for another enthusiast. I am sure there are a couple of us out here who would love to alleviate your eyestrain and take an engine off your hands.
I am sure they would even pay the shipping!Seriously though find a plane where you can hide it under a cowl, if you have to, and enjoy it.
I have never used the 55 but I have two 46AX and a 35AX and I love them!
It is disappointing when a product we have grown to trust and love starts to come out with corners cut and the product cheapened. For my money OS is still one of the better investments out there. I am not trying to denegrate any other manufacturer by the way. I think all of the companies have there lemon and they all have there jewels too.
I am shopping for a four stroke for my Astro Hog and OS is at the top of my list.
Here is hoping for many more good years for them.
Cheers
Gord
07-19-2011, 07:49 AM
#37
RE: (breatherless) new OS 4-strokes
ORIGINAL: Sport_Pilot
Well that must have actually worked out well. Now every car has unibody. The last body on frame was the 2007 Crown Vic.
The unibody construction was another name for cheap and flimsy.
Bob
07-19-2011, 07:51 AM
#38
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RE: (breatherless) new OS 4-strokes
ORIGINAL: tryingagain
OK Ed I have to ask. If the 55 is so ugly, why did you end up with 2 of them?
One thing I have noticed on RCU is the number of guys willing to do whatever they can for another enthusiast. I am sure there are a couple of us out here who would love to alleviate your eyestrain and take an engine off your hands. I am sure they would even pay the shipping!
Seriously though find a plane where you can hide it under a cowl, if you have to, and enjoy it.
I have never used the 55 but I have two 46AX and a 35AX and I love them!
It is disappointing when a product we have grown to trust and love starts to come out with corners cut and the product cheapened. For my money OS is still one of the better investments out there. I am not trying to denegrate any other manufacturer by the way. I think all of the companies have there lemon and they all have there jewels too.
I am shopping for a four stroke for my Astro Hog and OS is at the top of my list.
Here is hoping for many more good years for them.
Cheers
Gord
OK Ed I have to ask. If the 55 is so ugly, why did you end up with 2 of them?
One thing I have noticed on RCU is the number of guys willing to do whatever they can for another enthusiast. I am sure there are a couple of us out here who would love to alleviate your eyestrain and take an engine off your hands.
I am sure they would even pay the shipping!Seriously though find a plane where you can hide it under a cowl, if you have to, and enjoy it.
I have never used the 55 but I have two 46AX and a 35AX and I love them!
It is disappointing when a product we have grown to trust and love starts to come out with corners cut and the product cheapened. For my money OS is still one of the better investments out there. I am not trying to denegrate any other manufacturer by the way. I think all of the companies have there lemon and they all have there jewels too.
I am shopping for a four stroke for my Astro Hog and OS is at the top of my list.
Here is hoping for many more good years for them.
Cheers
Gord
Hi, Gord.
I always kid around about how ugly my Saito engines are too, but I still have all of them.
I'm sure that there was a story behind why I have two NIB OS .55AX engines, but I can't remember it. I must have had a twin engine model in mind. Wouldn't you guess?
Ed Cregger
07-19-2011, 08:30 AM
#39
RE: (breatherless) new OS 4-strokes
ORIGINAL: buzzard bait
I'd like to know who has put a nipple on the 81a. I'm afraid to put fuel in mine till I know how to protect it. Another guy in the club got one and pretty soon it started sounding like a garbage truck. He opened it up and the bearings were totally shot. Out of warranty, OS charged him a bundle to fix it. Now he's afraid to run it too.
Jim
I'd like to know who has put a nipple on the 81a. I'm afraid to put fuel in mine till I know how to protect it. Another guy in the club got one and pretty soon it started sounding like a garbage truck. He opened it up and the bearings were totally shot. Out of warranty, OS charged him a bundle to fix it. Now he's afraid to run it too.
Jim
07-21-2011, 12:34 PM
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RE: (breatherless) new OS 4-strokes
About running the engines dry at the end of the day..... yes, I sure do that but I thought it was 2-strokes where fuel entered the crankcase thus being of great importance to run them dry. Can't see how running a 4-stroke dry would help prevent rust in the bottom end much ... ?
Ernie
Ernie
07-21-2011, 04:00 PM
#41
RE: (breatherless) new OS 4-strokes
I just discussed the OS 81a with my friend who had the bearings rust. Now that his is fixed he is also waiting to run it till he decides what to do.
His thought was to hook up a fuel tank full of ARO to the fuel nipple on the engine and then spin it with an electric starter. His thinking was that four strokes have good enough draw that simply spinning the engine with the starter would suck in the oil, and by spinning for several seconds you would get it distributed to the same places you would if you actually ran it with fuel.
I don't know the answer to the question above about running engines dry. Our assumption is that at the end of each flying session you would first run the engine dry, then hook up the oil supply to the fuel nipple, and then spin the heck out of the engine for a bit.
Anybody see any reason why this wouldn't work?
Jim
His thought was to hook up a fuel tank full of ARO to the fuel nipple on the engine and then spin it with an electric starter. His thinking was that four strokes have good enough draw that simply spinning the engine with the starter would suck in the oil, and by spinning for several seconds you would get it distributed to the same places you would if you actually ran it with fuel.
I don't know the answer to the question above about running engines dry. Our assumption is that at the end of each flying session you would first run the engine dry, then hook up the oil supply to the fuel nipple, and then spin the heck out of the engine for a bit.
Anybody see any reason why this wouldn't work?
Jim
07-21-2011, 07:59 PM
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RE: (breatherless) new OS 4-strokes
>>> Anybody see any reason why this wouldn't work? >>>
Yes, it won't work simply because it is a 4-stroke. It would work on a 2-stroke where fuel (oil in this case) is drawn into the crankcase and bearing area. On a 4-stroke the fuel is drawn only into the combustion chamber and exits through the exhaust...... so there is only one solution and it is an easy one, to drill and JB Weld a nipple into the back plate. Very easy to do. Put a piece of tubing onto the nipple and keep it plugged while running, then at the end of the day unplug it and shoot a big slug of ARO directly into the crankcase. Re-plug tubing.
I know, a tiny bit of oil blows past the ring and lubes the bottom end while they are running, but you are not going to get a large volume of ARO into the bottom end that way at all. Your friend's idea isn't new. I have seen a couple of people doing just that and thinking they are protecting the bearings but they are not.
Ernie
Yes, it won't work simply because it is a 4-stroke. It would work on a 2-stroke where fuel (oil in this case) is drawn into the crankcase and bearing area. On a 4-stroke the fuel is drawn only into the combustion chamber and exits through the exhaust...... so there is only one solution and it is an easy one, to drill and JB Weld a nipple into the back plate. Very easy to do. Put a piece of tubing onto the nipple and keep it plugged while running, then at the end of the day unplug it and shoot a big slug of ARO directly into the crankcase. Re-plug tubing.
I know, a tiny bit of oil blows past the ring and lubes the bottom end while they are running, but you are not going to get a large volume of ARO into the bottom end that way at all. Your friend's idea isn't new. I have seen a couple of people doing just that and thinking they are protecting the bearings but they are not.
Ernie
07-22-2011, 10:52 AM
#43
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RE: (breatherless) new OS 4-strokes
I think OS didn't learn their lesson about inferior metallurgy after the ABN episode. With valve springs slamming a valve shut at how many times a second, I see anything softer than Bronze or similar in the seat/guide to fail before its time. Maybe a valve will wear in its guide and the keeper wil let go, which will take care of the piston. that's really too bad since OS does know how to make a great engine; it just chaps me they want to compete price wise with YS which is silly. BTW, the only Vega worth having had the Cosworth engine; The fourbanger was an afterthought since Chevrolet was going to drop in a 350 but the impending doom insurance deal put an end to that. Teflon cylinders, anyone want to drop a suggestion to OS?
07-22-2011, 11:24 AM
#44
RE: (breatherless) new OS 4-strokes
I have also used Marvel Mystery Oil.....is this any good?
07-22-2011, 11:26 AM
#45
RE: (breatherless) new OS 4-strokes
ORIGINAL: Roary m
I think OS didn't learn their lesson about inferior metallurgy after the ABN episode. With valve springs slamming a valve shut at how many times a second, I see anything softer than Bronze or similar in the seat/guide to fail before its time. Maybe a valve will wear in its guide and the keeper wil let go, which will take care of the piston. that's really too bad since OS does know how to make a great engine; it just chaps me they want to compete price wise with YS which is silly. BTW, the only Vega worth having had the Cosworth engine; The fourbanger was an afterthought since Chevrolet was going to drop in a 350 but the impending doom insurance deal put an end to that. Teflon cylinders, anyone want to drop a suggestion to OS?
I think OS didn't learn their lesson about inferior metallurgy after the ABN episode. With valve springs slamming a valve shut at how many times a second, I see anything softer than Bronze or similar in the seat/guide to fail before its time. Maybe a valve will wear in its guide and the keeper wil let go, which will take care of the piston. that's really too bad since OS does know how to make a great engine; it just chaps me they want to compete price wise with YS which is silly. BTW, the only Vega worth having had the Cosworth engine; The fourbanger was an afterthought since Chevrolet was going to drop in a 350 but the impending doom insurance deal put an end to that. Teflon cylinders, anyone want to drop a suggestion to OS?
They use the high silicon aluminum for valve guides in lawn mowers and I have never seen one wear out. I would think they would work fine in the much lower temperature operating range of glow engines.
07-22-2011, 01:06 PM
#46
RE: (breatherless) new OS 4-strokes
ORIGINAL: Sport_Pilot
They use the high silicon aluminum for valve guides in lawn mowers and I have never seen one wear out. I would think they would work fine in the much lower temperature operating range of glow engines.
ORIGINAL: Roary m
I think OS didn't learn their lesson about inferior metallurgy after the ABN episode. With valve springs slamming a valve shut at how many times a second, I see anything softer than Bronze or similar in the seat/guide to fail before its time. Maybe a valve will wear in its guide and the keeper wil let go, which will take care of the piston. that's really too bad since OS does know how to make a great engine; it just chaps me they want to compete price wise with YS which is silly. BTW, the only Vega worth having had the Cosworth engine; The fourbanger was an afterthought since Chevrolet was going to drop in a 350 but the impending doom insurance deal put an end to that. Teflon cylinders, anyone want to drop a suggestion to OS?
I think OS didn't learn their lesson about inferior metallurgy after the ABN episode. With valve springs slamming a valve shut at how many times a second, I see anything softer than Bronze or similar in the seat/guide to fail before its time. Maybe a valve will wear in its guide and the keeper wil let go, which will take care of the piston. that's really too bad since OS does know how to make a great engine; it just chaps me they want to compete price wise with YS which is silly. BTW, the only Vega worth having had the Cosworth engine; The fourbanger was an afterthought since Chevrolet was going to drop in a 350 but the impending doom insurance deal put an end to that. Teflon cylinders, anyone want to drop a suggestion to OS?
They use the high silicon aluminum for valve guides in lawn mowers and I have never seen one wear out. I would think they would work fine in the much lower temperature operating range of glow engines.
07-22-2011, 04:07 PM
#47
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RE: (breatherless) new OS 4-strokes
That's a new one on me; If the aluminum will work, well why not. I didn't know lawn mowers were using the same material in guides and seats. You're right about operating temp which would make or break the engine.
07-22-2011, 09:14 PM
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RE: (breatherless) new OS 4-strokes
>>> No, it will not mix with the oil already in the engine. This causes mosisture being trapped between the oil and metal parts causing pitting. You need one that will, either a thick synthetic, or castor oil. I would suggest using the after run oil YS recommends. >>>
Sport Pilot, what about Marvel Air Tool Oil? We've been using that for decades.
Thanks,
Ernie
Sport Pilot, what about Marvel Air Tool Oil? We've been using that for decades.
Thanks,
Ernie
07-22-2011, 09:25 PM
#49
RE: (breatherless) new OS 4-strokes
Sport Pilot, what about Marvel Air Tool Oil? We've been using that for decades.
07-23-2011, 04:38 PM
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RE: (breatherless) new OS 4-strokes
I think the only engine you would absolutely not use Marvel Mystery in are the YS makes. It will attack the diaphragm membrane. There may others I am not aware of.