[AT] Kinda Antique Tractor Question

[Phil Auten]

The first thing that comes to mind is the piston contacting the ground 
terminal of the plug. But if that were the case there would be noise, I 
would think, and the starting would revert to terrible quickly. Perhaps 
there is a piece of carbon floating around inside the cylinder that 
occasionally gets pinched between the piston and the plug? I just can't 
visualize anything else. If the head isn't to difficult to get to you 
might pull it and check for something like that. Is that a flathead or 
an OHV engine?

Phil in TX


On 11/29/2019 6:11 PM, craig.warner47346 at frontier.com wrote:
> I’ve got a question that’s kinda antique tractor related (depending on 
> how you define antique.) I have a 1992 Ingersoll 6018 with an Onan 
> 16hp motor. It usually starts and runs great. Last few weeks it’s been 
> terrible to start but then runs fine. I pulled the plugs today and the 
> gap was close to nothing in both of them. Opened the gap to.030 and it 
> fired right up. Why would the plug gap close? I had issues with them 
> this spring and set it at that point.
>
> Thanks,
>
> Craig
>
>
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