OS Max 61 SF problems
03-15-2022, 11:50 AM
#1
OS Max 61 SF problems
Good afternoon, I'm new to the forum.
I recently purchased an OS Max 61 SF ringed, it already had problems with the bearings, so I sent them to be changed by a mechanic I trust. Now the engine heats up a lot when it is on and in flight it lost power, and it is very difficult to regulate its idle. It has a 13x6 propeller and I use Omega fuel with 10% nitro, and OS N° 8 glow plug
Could it be because of the propeller and the change of bearings (2 tanks have just been used since the bearings were changed), that the engine heats up a lot and loses power in flight?
Compare the compression against an ASP 46 engine I own, and ASP has much more compression than OS 61 SF.
As the engine has a ring, the compression is not as great?
Greetings.
I recently purchased an OS Max 61 SF ringed, it already had problems with the bearings, so I sent them to be changed by a mechanic I trust. Now the engine heats up a lot when it is on and in flight it lost power, and it is very difficult to regulate its idle. It has a 13x6 propeller and I use Omega fuel with 10% nitro, and OS N° 8 glow plug
Could it be because of the propeller and the change of bearings (2 tanks have just been used since the bearings were changed), that the engine heats up a lot and loses power in flight?
Compare the compression against an ASP 46 engine I own, and ASP has much more compression than OS 61 SF.
As the engine has a ring, the compression is not as great?
Greetings.
Last edited by alesjob; 03-15-2022 at 11:56 AM. Reason: wrong text
03-15-2022, 03:57 PM
#2
Yes I would try a 12/6 or 11/7 prop. I don't think that the new bearings would have much effect on heating the engine up if anything it should help it run cooler. Go for the prop change. I have always used 11/7 props on .60 size motors.
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alesjob (03-15-2022)
03-15-2022, 04:53 PM
#3
Another query, The difference in compression between ASP 46 and OS SF61, could it be because the OS has a ring?
Greetings.
03-15-2022, 05:25 PM
#4
You'll know more about the ring and compression after you run the engine with a proper prop. If it runs good then your good to go no problem. If it continues to over heat and stop or is hard to tune and burns out glow plugs then the ring and sleeve is probably worn out.
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alesjob (03-16-2022)
03-16-2022, 03:51 AM
#5
Sabrá más sobre el anillo y la compresión después de hacer funcionar el motor con una hélice adecuada. Si funciona bien, no hay problema. Si continúa sobrecalentándose y se detiene o es difícil de sintonizar y quema las bujías incandescentes, es probable que el anillo y el manguito estén desgastados.
