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6.5K Onan Marquis smoking and blowing oil

February 07, 2021, 06:43:58 pm

Two weeks ago I came out to MH after visit with Grand Son.  The genset had been running for several hours.  It looked  like the MH was on fire.  OH ----, I ran out and the genset was running, smoking every where, none out the exhaust.  I killed it.  It was blowing  oil every where. 
Today I got it out, took the top off.  Look what I found.  It is a welch plug blown out with a silicone plug also.  There is a part number for it is 519-0293 in the parts book.  I have bought it for $4.15 and $4.95 shipping.  The plug is used to stop up the hole on the case where the governor shaft goes into engine.
I wonder why did the plug come out?  Why had someone put red silicone on the plug?
I will put the new plug in the hole, run the genset and hope the plug does not come out later.??  I don't know of any way to test the plug.

Any comments and ideas,
Pat

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Re: 6.5K Onan Marquis smoking and blowing oil

Reply #1 – February 07, 2021, 08:25:12 pm

Wow, never heard of that one.

When back going, check crankcase pressure-- about all I can think of.

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Re: 6.5K Onan Marquis smoking and blowing oil

Reply #2 – February 07, 2021, 10:26:51 pm

Check the muffler.  It has a drain plug because it collects carbon.  Part the the spark arresting feature.

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