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Yamaha 4 Stroke Yamaha 4 stroke engines

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Old 10-18-2009, 03:03 PM   #1
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water in spark plug space

Hey everyone,

I'm in the process of winterizing my ski for the first time. I sprayed the fogging oil in and from a previous thread someone takes the spark plugs out to check if there wet. I thought to myself its a good idea because I'm a little nervious.

Anyways my main concern was when I took the ignition coil out there was water in the void. The water was about 1/2cm to 1cm deep (just enough to cover the nut of the spark plug). The coil had rust residue all around plastic and some inside the void. This is the kicker though, there was water in the first two closest to the front, but not in the back two. When I was taking them out everything seemed tight and sealed, so I didn't understand how this could happen.

I used a small hose and sucked it out, but I was wondering how this would have happend? Could there be any damage? What would you suggest I use to get the rust out of the void? The residue just rubs off the ignition coil so not to worried about them, or should I be?

Is there anything else I should check?

Thanks
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Old 10-18-2009, 05:41 PM   #2
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Re: water in spark plug space

Water down in the plug / coil bores usually gets there when the motor is rinsed when hot. The cold water on a hot engine gets sucked down passed the coil seals.
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Old 10-18-2009, 08:24 PM   #3
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Re: water in spark plug space

U need to di-electric grease the plug sealing area, pull the rubber down appply some then push it back up, then put some around the sealing surface on the rubber.

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Old 10-18-2009, 08:35 PM   #4
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Re: water in spark plug space

ok thanks for the info. I did rinse the motor after I changed the oil about a week ago. I guess I should have waited untill it was cooler, eneough tho it didn't run very long. I will also get some di-electric grease. When you say pull the rubber down, what do you mean?
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