Onan Locked Up
Onan genset (5500 Marquis HGJAB) with 417 hours locket up while running. Got to where I could put a socket on the fan and freed up the motor (working it back & forth) but now when running it sounds l...
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Tell you what, I think you had a siezed engine.
This is not a great fix, but may get you by for some time... I can't guarantee it.
Put heavy Marvel Mystery Oil in the gas (the highest suggested amount).
Change the genny oil, and put at least a quart of Marvel Mystery Oil in the genny oil (in exchange for a quart of regular oil).
This stuff is super oil.
If it continues to do the sounds, work your way the opposite.
Drain the oil out completely.
Use Non-Detergent 30 weight oil in the engine. The idea here is to get micro carbons filling in any possible scratched surfaces between the piston rings and cylinder wall. It's basically a "rig" to get more hours out of an engine. It actually can last a long time. IT's not a fix, but it works.
This is not a great fix, but may get you by for some time... I can't guarantee it.
Put heavy Marvel Mystery Oil in the gas (the highest suggested amount).
Change the genny oil, and put at least a quart of Marvel Mystery Oil in the genny oil (in exchange for a quart of regular oil).
This stuff is super oil.
If it continues to do the sounds, work your way the opposite.
Drain the oil out completely.
Use Non-Detergent 30 weight oil in the engine. The idea here is to get micro carbons filling in any possible scratched surfaces between the piston rings and cylinder wall. It's basically a "rig" to get more hours out of an engine. It actually can last a long time. IT's not a fix, but it works.
