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Search: Posts Made By: MKnutson
Showing results 1 to 25 of 97
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Forum: Gas Engines
05-27-2014, 08:54 PM
Replies: 41
Views: 9,330
Posted By MKnutson

I second the suggestion to run Stihl HP Ultra...

I second the suggestion to run Stihl HP Ultra oil! It's the only oil I use in all my engines, 2 or 4 stroke.
Try it, it does'nt coke the inside of the crankcase like others.

Mark.
Forum: ARF or RTF
05-27-2014, 06:46 PM
Replies: 3,052
Views: 378,051
Posted By MKnutson

For a kind of sleek look, try the gear off the GP...

For a kind of sleek look, try the gear off the GP Ultimate bipe 160. It fits perfect mounted to the fuse, just the right amount of ground clearance.
Mark.
Forum: Gas Engines
03-23-2014, 09:14 PM
Replies: 221
Views: 61,670
Posted By MKnutson

While flying today, the muffler joiner tube...

While flying today, the muffler joiner tube snapped off just outside the jam nut at the head. Muffler was like a little bomb coming down way out there, didn't even try to find it!
The worst part is,...
Forum: Gas Engines
03-17-2014, 05:43 PM
Replies: 41
Views: 9,330
Posted By MKnutson

I've been running mine for about 9-10 months now...

I've been running mine for about 9-10 months now without any problems.
You had this issue quite a while back originally, and I've been watching mine ever since for wear.
So far, no excessive...
Forum: Gas Engines
08-21-2013, 08:39 PM
Replies: 221
Views: 61,670
Posted By MKnutson

Just opened the valve cover for a quick check,...

Just opened the valve cover for a quick check, and it's very clean and oily with no slop on the rocker shafts. I've also got a Saito 57T and on that engine I worry about the LACK of oil on the cams...
Forum: Gas Engines
08-21-2013, 08:12 PM
Replies: 171
Views: 46,117
Posted By MKnutson

I found out after flying that the heat from the...

I found out after flying that the heat from the engine soaks into the carb after being shut down for a bit and it gets a little vapor lock. I just let it cool for a bit longer before the next flight....
Forum: Gas Engines
08-20-2013, 09:09 PM
Replies: 171
Views: 46,117
Posted By MKnutson

I've got mine in a GP Ultimate bipe 160 and it...

I've got mine in a GP Ultimate bipe 160 and it flies it great. I haven't had any cooling issues with it yet short of the carb getting heat soaked after a flight, then trying to start it with the carb...
Forum: Gas Engines
08-20-2013, 08:26 PM
Replies: 221
Views: 61,670
Posted By MKnutson

Just curious, what type and how much oil were you...

Just curious, what type and how much oil were you useing in the fuel? Mine is still clean under the rocker cover, with plenty of oil. I'm running Stihl HP ultra at 30-1.

Mark.
Forum: Gas Engines
08-07-2013, 06:25 PM
Replies: 8
Views: 1,369
Posted By MKnutson

All the old posts?

Did all the old posts get deleted or what?

Mark.:mad:
08-06-2013, 08:33 PM
Replies: 3
Views: 83
Posted By MKnutson

Old posts?

What happened to all the old posts?
This new site is unblievable! VERY Confusing try and use! Bring back the old site!

Mark.
Forum: Gas Engines
07-14-2013, 07:57 PM
Replies: 221
Views: 61,670
Posted By MKnutson

RE: O.S. GF40 4st gas

The tank in my plane, (Giant super sportster), is right in line with the carb and it's also a fairly small one too, 8oz.
The instructions say to leave fuel in the carb when your done for the day,...
Forum: Gas Engines
07-08-2013, 03:46 PM
Replies: 221
Views: 61,670
Posted By MKnutson

RE: O.S. GF40 4st gas

Remember, when you get it close, a screwdriver blade width is all it takes sometimes.

Mark.
Forum: Gas Engines
07-07-2013, 09:31 PM
Replies: 221
Views: 61,670
Posted By MKnutson

RE: O.S. GF40 4st gas

I will agree, the DLE's are a bit simpler to deal with, I've got a whole fleet of them- 20cc, 30cc, 35ra, & 50cc, and they all run good.
The OS is not quite as easy to work with. I tend to break my...
Forum: Gas Engines
07-05-2013, 10:48 PM
Replies: 221
Views: 61,670
Posted By MKnutson

RE: O.S. GF40 4st gas

So far, my OS40 is still running really well. It seems to like the xoar 19-8 on the super sportster.
The mixture screws are really touchy and don't need to be turned much to make a big difference....
Forum: Gas Engines
06-22-2013, 08:19 PM
Replies: 6
Views: 762
Posted By MKnutson

RE: *4 Stroke Gasser For 1/4 Scale Cub*

Iv'e got the new OS 40cc gas 4s and it is sweet, although a bit pricey.

Mark.
Forum: ARF or RTF
06-03-2013, 08:30 PM
Replies: 3,052
Views: 378,051
Posted By MKnutson

RE: New Giant GP Super Sportster!!!!!

Skypilot,
If I could figure out how to do pics I would. This new engine pulls this plane perfect, even the 3d guys at the field like it!
I used the fiberglass gear off the GP ultimate bipe 160,...
Forum: Gas Engines
05-28-2013, 07:13 PM
Replies: 221
Views: 61,670
Posted By MKnutson

RE: O.S. GF40 4st gas

I think the 40cc OS would fly the Tiger Moth just fine! Just put a big dia. flat pitch prop on it to fly slow.
I don't think that the OS would be overkill, but it would be at the higher end for...
Forum: Gas Engines
05-27-2013, 12:54 PM
Replies: 221
Views: 61,670
Posted By MKnutson

RE: O.S. GF40 4st gas

Once you get it leaned out from the stock settings at idle, it will get smoother running. Have you tried running it at full throttle yet since you mentioned youv'e had it up to only 4500 rpm. As far...
Forum: Gas Engines
05-24-2013, 09:31 PM
Replies: 221
Views: 61,670
Posted By MKnutson

RE: O.S. GF40 4st gas

The throttle response is very quick, and yes, since it has a walbro it doesn't have a linear throttle.
What I do is use the throttle curve in the transmitter to help linearize the power, it works...
Forum: Gas Engines
05-21-2013, 08:54 PM
Replies: 221
Views: 61,670
Posted By MKnutson

RE: O.S. GF40 4st gas

Iv'e got the DLE 35RA rear exhaust also, and it is no slouch in the power dept.
Power to weight, the 4 strokes will never be as good as similar size 2 strokes for all out power.
I wasn't going...
Forum: Gas Engines
05-20-2013, 09:13 PM
Replies: 221
Views: 61,670
Posted By MKnutson

RE: O.S. GF40 4st gas

Iv'e been flying it on my new Giant super sportster and it's getting better every flight!
About 10-15 flights so far and it pulls like crazy! 19-8 Xoar laminated is what it seems to like so far.
...
Forum: ARF or RTF
05-20-2013, 07:24 AM
Replies: 3,052
Views: 378,051
Posted By MKnutson

RE: New Giant GP Super Sportster!!!!!

Just finished up the GSS, and maidened it on Sunday. It is a nice change back to old school from the extras and yaks.
This plane lands so nice it would make anyone look good. Iv'e got one of the...
Forum: Gas Engines
05-16-2013, 09:07 PM
Replies: 221
Views: 61,670
Posted By MKnutson

RE: O.S. GF40 4st gas

Ernie,
Tower has them on their web site, and in stock too.

Mark
Forum: Gas Engines
05-16-2013, 09:04 PM
Replies: 221
Views: 61,670
Posted By MKnutson

RE: O.S. GF40 4st gas

I got it all mounted up to the test stand and ran it this evening.
The idle mixture screw was way too rich, so I leaned it up a bit then it finally started up then we went in a little more to get...
Forum: Gas Engines
05-15-2013, 07:28 PM
Replies: 221
Views: 61,670
Posted By MKnutson

RE: O.S. GF40 4st gas

I'lll have it running VERY soon. I had to make the prop shaft adapters down at work, but it will be running soon.
I know this was alot of money, but, after fondleing it for a bit I think it's going...
Showing results 1 to 25 of 97
 


 
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