Posted by NCWayne on December 03, 2009 at 10:10:15 from (173.188.168.35):
In Reply to: onan power unit posted by axhandle on December 02, 2009 at 19:18:18:
Have you checked compression on both cylinders? You may have one dead cylinder and the other just can't handle the load without bogging down and kiling the engine. The Onans are notorious for throwing rods, etc and still running on one cylinder. I've heard of them having a rod sticking out of the block and still running. Personally I've got about 5 of them in the shop right now with broke rods, one with a broke rod and broke cam shaft together, and all of them were running when they came in the door. I might be wrong but ther symptoms sound familiar.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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