Re: Loss of power in a small engine?

Posted by Billy Shafer on March 08, 2012 at 11:22:25 from (173.184.20.160):

In Reply to: Re: Loss of power in a small engine? posted by paulinkansas on March 08, 2012 at 10:59:24:

The NH engines did have a problem with valve seats coming loose. Both cylinders should be warm just after starting. Of course the cold one will be your bad one.It can run on one cylinder and carry part of a load. Coils rarely go bad but it can happen. Both plugs fire at the same time.

Do you have any signs of carbon build up. I have seen carbon stick behind a valve.You really need to get a compression reading.Not a lot of problems with air leaks on that engine. Sticking valves were also a problem. There was also a problem with lifters sticking on some Onan engines.

Don't recall any warnings from the factory about loss of power. Except for the normal items.

Onan tech since 1980.

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