plugs for 67 20 hp chrysler

5

56 rude

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Aug 8, 2008
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Well took my free 20 hp chrysler (67) for a spin today ,all went well till the top plug blew out.No problem thats what they make helicoils for.Anyways what plugs should i be using ,it had j4c in it or should i go to j6c or ?Will have to order a manual ,What a great little motor, i was going so slow the walley were passing me!lol.
 
eurolarva

eurolarva

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4,182
Re: plugs for 67 20 hp chrysler

Original plug was a J4J which was superseded by a J4C which is still available. I would stick with that. Most chryslers used a L4J however the 20 hp series 2000 was spec with a J4J. If it has been working good so far stay with it. If you go to a J6C you may be using a hotter plug which could be a problem
 
5

56 rude

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Messages
198
Re: plugs for 67 20 hp chrysler

Ok thanks ,will stick with the original plug then.Nice quite little motor,doesnt look near as good as my 18 (58)johnson does but it is funky,lol.
 
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