John Serjeant

I have just purchased the OS 200 pump version engine.
Comes withoiut any tools, i.e. spanners or valve adjusting tools. I only make this comment as previously purchased OS 120 did so.

Now, moving on to the muffler/silencer. Looks good and I expect it will be effective.

However, for "scsale" typoe usage, i.e. in cowl and mounted in an inverted postion, the large muffler is going to be a problem I can forsee. I,m thinkin terms of Mustang H 9 etc.

An adaptor of some kind is necessary to re position the muffler; or an after market muffler system. So far, as commented above in this forum, there dosn't seem to be one.
Would be grateful if any of the readers and contributors have (as yet) solved the problem.

regards
John SErjeant.

Incidentally, I finf that this engine doesn't fit the )S 120 engine mount; too long by a few mm.

John Serjeant

Has anyone with an OS 200 fs pump or other wise, solved the problem of after market exhausts/manifold for this engine?>

Apart from the aforemntioned Hatori pipe, there isn't anything available.

Would previous contributors with similar problems like to reply re this with their experiences.

Has anyone an email direct to O S engines?>
John Serjeant

Texan

My Feedback: (10)

Keleo Creations added a pitts muffler for the OS200.

flyingbells

OMG Toga, you've got everything!

how does the power of the Saito Gas stack up with the rest? Any figures?

John Serjeant

Thanks "Texan" for your reply.

May I ask where I can obtain Keleo products?.

GarySS

My Feedback: (13)

See: http://www.keleo-creations.com/produ...roducts_id=107

$115.00

sportsbeast

I have the 220 and love it. I think the OS looks nice as well but the 220 seems to be more powerful.

meloni1985

Hi to everyone,

I have a doubt regarding the 200S-P I recently purchase..
Originally I bought the original FS200S, the one without pump, and I use this engine in a Carl Goldberg Obsession; everything was fine, ant the performance of the engine were great like all the other OS i own, the only issue was the cg shifting caused by the fuel tank right behind the firewall, so I decive to sell the 200P and Buy the new FS200S-P.
The new one instead to be more powerful (like the advertise says..) has instead less power and torque, turning at less rpm the same prop the "old" use to spin very well. I notice also more fuel consumption and from the hole in the black assembly in the carburator there are a lot of fuel spitting, making a mess in the cowl of the plane. The engine seems to be almost non sensible to any high speed needle adjustment, with the best position oround half turn from full closed. the rpm are always around 7300-7500 using from a small APC 16X8 up to a Graupner G-sonic 18X10, but always hundreds rpm slower than the standard 200.
I dont really have reilability problem (never had a engine failure) but just very poor performances.
I'm using a 20% sintetic oil and 10% nitro fuel and the new 200 has less than 2 gallons thru it.

Thanks for any input

NM2K

My Feedback: (14)

You may have answered your own question right at the end of your post. You said it only has two gallons of fuel through it. It could be that the engine isn't broken-in yet and still requires a rich mixture to keep running without overheating. I would give it another gallon or two of fuel before worrying about it. A gallon of fuel really isn't much for such a large engine. Also, check the obvious things such as valve lash and switching to another glow plug.


Ed Cregger

PlaneKrazee

My Feedback: (14)

Add some castor to the fuel and see if it performs better. The extra lube might be what it needs for a few gallons.

meloni1985

hi, thanks for the fast answers, the next time I go to fly I try with some more oil, the valve clearence is ok now ( was a little loose but I felt no change in performances after the adjustment..) the plug seems to be ok, but maybe Y will try another one.....
What do you think about the fuel spitting from the hole in the pressure regulator and carburator and the non-sensibility to the high speed needla (where the "old"200S was very sensible to every click and almost spitting-free...)

Thanks a lot and have a nice landing..

togatoga

My Feedback: (42)

I think you have a leak in the regulator preventing optimum fuel delivery. Therefore the loss of power and poor HS needle response. It sounds like the diaphragm is not seated properly or it has sprung a leak.If its under warranty, send it back for a fix. If you must,open the regulator and have a look, hopefully its the diaphragm that is misaligned.Sometimes they goof at the factory.

meloni1985

to be honest this is one of my 1'st option, but I bought the engine in US and I am now for a medium period of time in another country, so the shipping / warranty process should be too long....

Do you know whats the story with the pressure regulator on the carburetor of the OS200 (should be just a diaphragm and a spring..) I cant see also what I can damage disassembling the regulator ans look if there is something unusual.. (I usually do mechanical repair / rebuild in rc and bigger engine).

Thanks for the input.

togatoga

My Feedback: (42)

Thats the problem with OS pump engines.The regulator is not sold separately but as a whole with the carb.It costs a lot so its better to send it back for warranty repair.If you must do it yourself, you must firstly ascertain that the leak is positively from the regulator and not from somewhere else. then unscrew the reg cover and you will see the diaphragm.The leak is caused when the diaphragm does not seat properly.Make sure the diaphragm is centred properly.If unfortunately you spot a tear then there's nothing you can do but send the motor back.I have done this before, its not really difficult.Do not overtighten the cover screws as it might distort and leak when putting it back on.Good luck!

Rudolph Hart

It's easy.OS engine has no rearward facing exhaust,and the one they have side mounted is pig ugly(2)no flex pipe(3)they sound awfull(4)not as much hp(5)dodgy hard plating?(6)what's a diaphram??..the handbrake is asking that question for me! and can it be replaced..at what cost to you??

The saito's heavier,just found that out reading this and will check the specs,but who relly cares?

meloni1985

hi, I inspect the "diaphragm" today was alright, just the two screw where a little over-tight (the plastic cap was a little bent) now the screw are just tighten enaugh to hold the cap in place and to prevent to be unscrewed in flight. now is cold and rainy but if the weather turns good I try on the test stand another time.
just to clarify the engine runs ok, just at full throttle show a very pronunced roughness and lack of power (compared with the 200 without pump I had in the past..)
What nitro % are you using? I'm using just 10% because my other glow (120 AX and the 200S use to run good and strong with this percentage)

THX

Hobbsy

My Feedback: (102)

Mel, did you inspect the fuel tube from the pump to the regulator body, it appears to be mighty cramped, I think I would make it longer with a nice flowing loop in it. A longer loop would not effect performance since it is before the regulator.

meloni1985

Hi,
actually I had to rotate 180 degrees the carburetor because the throttle linkage was on the other side of the plane.

Anyway at the time I make sure to use good quality 2.5mm int. diameter fuel tubing and avoid any kind of tight turn. I still think I have an air leak somewhere in the line ;the only explenation for the roughness at full throttle and the very difficult 1st start each day where the engine remains dry for a long time showing difficulty to sucks the fuel. (all the other starts are easy).

bye bye

Flyer95

My Feedback: (1)

I own both engines and have run about 1/2 gallon thru each of them. Both engines are running suprisingly smooth and very quiet and for now I run an APC18x6w on both to keep the plane speed down.
My vote goes for the Saito220 mainly because it is a whole lot stronger engine turning almost 1000rpm more on the same prop. My homebrew fuel contains 10% nitro and 15% oil Syntetic/castor blend and the fuel consumption is about 1-1.2oz/min on mixed aerobatic flight.

Ken Cz

I have a new OS 200 and as soon as we have a decent day here in Michigan I plan to begin the break-in.
I am using an APC 18x6W prop and 15% nitro PowerMaster Fuel.
What kind of RPM's should I expect to see??

Thanks All!
Ken

Flyer95

My Feedback: (1)

Hello, I am seeing about 8000rpm on the OS200 with the 18x6w but the engine is new and the weather is cold. I usually get 3-400rpm more on the sumer when the air is thinner.

Hobbsy

My Feedback: (102)

Ken, keep us posted and if you don't mind let us know the needle settings, Thanks, Dave

BTerry

My Feedback: (8)

I can't recall exactly, but my OS 1.60fx didn't turn the APC 18x6w much over 8500 rpm. If you are getting 8000 new for a significantly lighter engine (accounting for muffler, pump, etc) that is impressive.

GarySS

My Feedback: (13)

I've ran two tank fulls on my OS200s while on a test stand. THe crankcase line to the carb came off during the second tank and caused oily goo to go all over and made me think I had a leak someplace. So keep an eye on that line for a while while breaking in.

Christoph P.

Hi Gary,

The crankcase liner problem is a bit of an issue with this engine. I have solved it successfully with a wooden plug in the access hole, following a suggestion from another forum member (see here: http://www.rcuniverse.com/forum/m_63...tm.htm#6314745).

Mine is now running stable after about 20 litres of fuel, though not particularly powerful (8000 - 8300 on APC 18x6W). The FS200 is a good sports engine, but please don't expect high performance.