Hey guys I’m new to the forum so I hope I’m posting in the right spot.
I bought a Lincoln Ranger 8 Welder Generator with the Kohler CH20S Engine. It only has 61 hours on it, when I bought it the owner said it had just been sitting in the back of a shop and hadn’t been run in 7 years. So I drained the tank completely and “rebuilt” the Keihin Carburetor with a new o-ring and gasket set and cleaned it out. Put a can of sea foam in the tank and got it to start running. It runs rough and super rich. Sounds like it might have a knock, but it only does it every once in a while... I got a new air filter and changed the oil with Royal Purple full synthetic 10w-30. New fuel filter. No changes what so ever. Changed the spark plugs and they were carbon fouled pretty bad. It sounds like the engine is missing. And I noticed that if I pull the spark plug wire on the cylinder opposite of the starter, the engine smooths out and sounds like it’s running great. So I thought it may be a spark issue. I replaced the ignition coil on that side with no change, I rewired the coils all the way back to the ignition switch thinking it may be a wiring issue. I used steel wool on the mounting surfaces for the coils thinking it could also be a grounding issue and also ran an auxiliary grounding wire... still no change. The good cylinder has 175psi of compression and the side that is missing has 172psi... so I'm completely at a loss. I’ve also tested for a leak on the intake gasket with no luck.... I’ve read that it could possibly be a blown head gasket but I don’t see how that could be it with only 61 hours.... maybe a valve issue? But I pulled the valve covers and roatated the engine and they’re opening and closing as they should be. My only other thought is possibly a timing issue? Maybe the magnet on the flywheel got bumped and moved somehow? I really don’t want to take the damn thing into a shop... any input, advice or solutions would be greatly appreciated! Sorry for the long post. I just wanted to get everything out there that I could.
I bought a Lincoln Ranger 8 Welder Generator with the Kohler CH20S Engine. It only has 61 hours on it, when I bought it the owner said it had just been sitting in the back of a shop and hadn’t been run in 7 years. So I drained the tank completely and “rebuilt” the Keihin Carburetor with a new o-ring and gasket set and cleaned it out. Put a can of sea foam in the tank and got it to start running. It runs rough and super rich. Sounds like it might have a knock, but it only does it every once in a while... I got a new air filter and changed the oil with Royal Purple full synthetic 10w-30. New fuel filter. No changes what so ever. Changed the spark plugs and they were carbon fouled pretty bad. It sounds like the engine is missing. And I noticed that if I pull the spark plug wire on the cylinder opposite of the starter, the engine smooths out and sounds like it’s running great. So I thought it may be a spark issue. I replaced the ignition coil on that side with no change, I rewired the coils all the way back to the ignition switch thinking it may be a wiring issue. I used steel wool on the mounting surfaces for the coils thinking it could also be a grounding issue and also ran an auxiliary grounding wire... still no change. The good cylinder has 175psi of compression and the side that is missing has 172psi... so I'm completely at a loss. I’ve also tested for a leak on the intake gasket with no luck.... I’ve read that it could possibly be a blown head gasket but I don’t see how that could be it with only 61 hours.... maybe a valve issue? But I pulled the valve covers and roatated the engine and they’re opening and closing as they should be. My only other thought is possibly a timing issue? Maybe the magnet on the flywheel got bumped and moved somehow? I really don’t want to take the damn thing into a shop... any input, advice or solutions would be greatly appreciated! Sorry for the long post. I just wanted to get everything out there that I could.