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Tractor Talk Discussion Forum

Honda Spark Plug

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Ian Curtis

03-22-2006 10:17:24




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Ok, i converted a 13hp Honda gas engine to run with propane. Are there a special spark plug to run with propane or i can use the same as i used with gas.
I have problems when it's hot.




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Glen in TX

03-22-2006 13:19:06




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 Re: Honda Spark Plug in reply to Ian Curtis, 03-22-2006 10:17:24  
Like RAB said you can run a bit colder plug or the same one with propane but probably one thing to try first is close your plug gap down to about .015". For LPG and natural gas fuels a plug gap of .015 -.018" is recommended. Engines will run smoother with the smaller gap. Reason why the colder plug and lower gap is the fuel should be a dryer vaporized charge requiring less fire to ignite. If you're running out of vapor in tank and start putting in too much liquid and not a good vaporized charge of propane it isn't going to run well either.

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RAB

03-22-2006 11:51:53




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 Re: Honda Spark Plug in reply to Ian Curtis, 03-22-2006 10:17:24  
There might be. I would have thought the standard plug should be OK, but with a cleaner burning fuel with few deposits to burn off, should be able to use a colder grade.
What are your problems? It helps to know when trying to help.
Have you upped the compression ratio at all for running on propane?
What colour is a plug when removed after running on load for a while?
Regards, RAB



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