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Discussion Starter #1
fella close to me has 318 for sale, reasonable price(525). says it runs on 1 cylinder, other wise it looks pretty solid, with deck. opinions on if this is something worth diving into for a project? im not an engine guy but willing to try and learn, thanks Matt.
 

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Discussion Starter #2
additional info, reported to not have obvious piston issue as far as it moves in the cylinder, thats all i know.
 

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Matt, for that price it is worth it for a parts tractor. The Onan engines are tanks and can be rebuilt (pricey) but last a long time. If possible, can you get a compression test on the two cylinders?
They should be around 110 to 120psi if good, but I have seen them run good at 95psi. If you have good compression on both equally, then its time to look at electrical issues. You didn't give us the age or Onan model (B43G or P218). From there we can give you more options to look at.
Good Luck,
Bob
 

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Matt, I'd go for it. I am not a motor guy either but can stumble my way through it (see my post in the Intermittant Engine Stall thread), at that price you can afford to throw some cash at the engine in it
 
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Discussion Starter #5
thanks, I'm going to try to make contact with him, I will keep you posted, and go from there.
 

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I bought an Onan running on one cylinder. The only problem was corrosion on one side of the coil.
 
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At the seller's asking price in my opinion you could not loose money. Selling it bit by bit or just taking a look at engine wise. It's winter time come spring folks are going to need to mow.
 

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Discussion Starter #14
I did get the 318. Nice gentleman just no time to look into run issue any more. He stated at first he thought was fuel issue he ran some new fuel lines, fuel filter, and cleaned carb. This didn't help. He then pulled head didn't notice anything major, I believe he put on a new head gasket and hasn't messed with
since. He said compression on one side was 30, 40 with oil on it this was before head gasket. I'll probably start with confirming my own compression readings first thing before I decide what's next? Just got it home tonight but did snap a couple pics. It's b43g. Thanks.
 

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Nice find Matt, I'll be following your progress/struggles
 

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Discussion Starter #18
Dad has a good compression tester, not home today but I'll start with that. Piddle with 318 and think about freshening up 430. What are the rules or important steps on checking compression on b43g? Thanks
 

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Matt,

Here is what is listed in the TM1590...basically just open your airways and take a deep breath, just like going to the doctor's office. 😄

compression test on Onan engine.JPG


Chuck
 
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