Need help with tuning a OS .60 FP engine! - RCCanada - Canada Radio Controlled Hobby Forum
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Old 06-09-2004, 09:39 PM   #1
Chris Cann
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Need help with tuning a OS .60 FP engine!

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I bought this engine last year at a swap meet wit my trainer. IT had a leak in the carb and I took it to Hobby Hobby they fixed it all up. Ever since then it had been running amazingly I flew all winter with it starting very nice in the winter and running great. I bought a H9 Pizazz from these boards, I decided I wanted the extra power for pull outs while hovering and such. I put it in the pizazz (my .60 engine) and it was running amazing. I could hover all day around 1/2 throttle and it had amazing pull out and unlimited vertical. I had was getting low on my cool power 10% and I decided to put some more cool power 10% in the bottle so I wouldn';t have to carry the 2 bottles, i filled up my one bottle and took it to the field this was about 1 month ago maybe a bit more. Ever since then It has been running like crud. I think the fuel I mixed was bad fuel but it runs of my .25 fp perfect and my t-maxx perfect. I bought some Omega 10% to use on the .60 as it didn't seem to run any good off the cool power and it has been running better not dead sticking but it will hover at just over 3/4 throttle now, I have tunned the high end needle vavle but it dosen;t seem to be peaking out like it used to. And it seems to be very rich so i lean out the high end and it won;t run very good getting really hot and such. I think the tuning is in needed in the low end but not sure. Can someone please help me did I ruin my engine by running the mixed cool power, it was 10% cool power mixed with more 10% cool power so i didn' t think it would matter.
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Old 06-10-2004, 06:13 AM   #2
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Have you tried to change your glow plug? They do wear out eventually.

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Old 06-10-2004, 09:53 AM   #3
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Take a few moments and go over you engine and make sure everything is tight and screwed down securily. Check the head bolts, back plate, carb etc etc. Over time its amazing how things can loosen up and if the screws are even a bit lose it can cause problems with your engine.

If you can access your low end needle with the plane idling keeping your fingers out of the way, adjust it in a little bit by little bit and if its out at all you will hear the rpm pick up as it comes into tune! If you turn it in too much you will hear the engine start to sputter so back it off slightly until it purrs again. Only use small adjustments at a time until it has the best peek rpm at idle!

Another way of doing this is to pinch off the fuel line while the engine is idling. If it goes more than 10 seconds, its too rich so turn in the low end needle about 1/8" only and try it again. You may have to do this a few times to get it right.

If the engine dies quickly say within 4 seconds, then its too lean so back the needle out 1/8" until it is within 5 - 8 seconds before it dies then it will be set fairly close!

Other than these things, check your fuel tank and lines for leaks or pinholes! Also if you see bubbles in the fuel line its an indication of foaming in the tank. You may have to repack the tank surroundings with foam to help isolate it from the engine vibration!

Please let us know if you are able to solve the problem. Other than these things, you may have to check out the piston and sleve for scratches which will greatly rob your engine of power! Just one grain of sand can scratch the piston and sleve but hopefully its one of the other things that is causing your power loss!
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Old 06-10-2004, 12:04 PM   #4
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I agree with Gary. Check the engine for leaks and put a new plug in. A good OS plug don't cheap out a get a lesser expensive one. If you have a fuel filter in the line blow it out or change it all together. Fuel might be bad but not likely if you other engine will run with it. Let us know how you make out.
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Old 06-10-2004, 12:30 PM   #5
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do you think a a3 os glow plug would be better then a os #8 and thanks everyone i'll check all my stuff on my engine!
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Old 06-10-2004, 01:56 PM   #6
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OS A3 is NOT better than the #8.

OS#8 is THE BEST plug all round on 2 strokes.
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