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Perkins engine , spark plug problem


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  #1  
Old 01-30-2019, 12:31:10 PM
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Tom Jamboretz Tom Jamboretz is offline
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Default Perkins engine , spark plug problem

I have just completed a Perkins engine build. It is the horizontal open crank type. The engines craps out. When I check the spark plug i find that it is sparking up inside of the plug and not at the electrodes. I clean the plug and it does the same thing again. It only runs about 1-2 minutes. I'm running it on regular gasoline with a buzz coil. Would appreciate any help. Thanks
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Old 01-30-2019, 01:22:25 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: Perkins engine , spark plug problem

Replace the plug. new gas shorts under compression, and once that happens, it will continue. You cab try heating the plug with a propane torch until the carbon and gas are burned off - don't know if that will work or not. Just hitting it with solvent won't do it.
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Old 01-30-2019, 09:21:50 PM
Jesse Zilafro Jesse Zilafro is offline
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Default Re: Perkins engine , spark plug problem

Tom put some wd40 in the plug and close the gap down some. And use cloeman gass.
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Old 01-31-2019, 12:59:55 AM
dkamp dkamp is offline
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Default Re: Perkins engine , spark plug problem

Champion plug?
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Old 03-06-2019, 06:11:49 PM
Andrew Mackey Andrew Mackey is offline
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Exclamation Re: Perkins engine , spark plug problem

Quite often, model engines just idle along with no load. The spark plug does not get hot enough to burn off carbon deposits, therefore they foul plugs. Short of haeting with a torch, you cannot clean all of the gunk out of the plug. if it is a home made plug, made of high temperature plastic or teflon, your only choice is to replace it. Once they short, as yours is doing, they are done unless you can heat them up hot enough to burn off the deposits. You cant do that with the plastic pugs. Colemans may help, but only if you have a good plug to begin with. A fouled plug simply will not work.
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Old 03-14-2019, 03:40:04 PM
crazydoug crazydoug is offline
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Default Re: Perkins engine , spark plug problem

I sand blast fouled plugs and they seem to work fine again. You do have to make sure and get any little grains of sand stuck around the insulator out, or they could end up in the cylinder.
Has anyone else tried this- is it not a good idea for some reason?
crazydoug

I have that same engine and it fouled plugs alot till i cut back on the fuel as much as possible.
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