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02-14-2023, 10:12 AM #15000 RPM
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stock 1996 225 ProMax heads wanted
i'm looking for a pair of 225 promax heads, I pulled the spark plug threads on one. Helicoiled it, and now is burning different than the other 5.
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02-14-2023, 12:14 PM #2
These were just listed and should work for you
https://www.screamandfly.com/showthr...-245-260-225PM
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02-14-2023, 05:23 PM #35000 RPM
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would that be stock cc?
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02-14-2023, 05:28 PM #4
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02-14-2023, 05:35 PM #55000 RPM
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I pulled the plugs this fall and five plugs are clean and the one with the coil is black. never look anymore into it. My thought was that, that plug wasn't transferring heat into the head because of the helicoil.
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02-14-2023, 05:40 PM #6
Maybe, but normally it would be the other way around... cold plugs foul - hot plug would be ash white or melted?
If that hole was detonating and wrecked the threads you have a bigger problem but the piston would probably show damage???
(Snowmobiles will rattle the plugs loose if they detonate... if you run them with loose plugs they blow out the threads (hot gas going past & high pressure).Last edited by David - WI; 02-14-2023 at 05:46 PM.
Let's just go ahead and make America great again!
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02-14-2023, 07:31 PM #7
Anyway, I'm just saying... don't buy a set of heads if your real problem is a dirty injector or a bad switchbox.
Let's just go ahead and make America great again!
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02-14-2023, 10:13 PM #85000 RPM
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you make a good point, I'll look more into it when it warms up. nothing I can do about it now. Too cold in Wisconsin.
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02-14-2023, 10:25 PM #9
Yes it is... I'm in WI and my boat is in storage.
Let's just go ahead and make America great again!
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02-14-2023, 10:35 PM #105000 RPM
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yea, mines is in the back corner of the pole barn. a bad switch box would affect more than just one plug, right? maybe a weak coil. Have to talk with WinTech and see what makes sense to test. Hell could be a bad plug. Nothing like winter, to get you to sit and think about what could be wrong.
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02-14-2023, 10:39 PM #11
Yeah, there's a limited number of things but I just don't think the helicoil is one of them.
Let's just go ahead and make America great again!
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02-14-2023, 10:46 PM #125000 RPM
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thanks for the help, I think your right.
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David - WI liked this post
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