Water behind fly wheel cover

mxhead

mxhead

Location
ontario
Been chasing this gremmlin for a month now. I thought I was getting water in the engine. Well after many failed attempts at keeping water out of the stator area, I'm starting to think my "water digestion" is water on my pick ups? Is this a thing? I'm thinking this would cause issues with performance and hard starting?

Attached are some pictures. Brand new fly wheel cover O ring. Just recently replaced starter as Well, but not the o ring.

Ski runs amazing until my first flop(no pun intended) and then it's not the same ski after that. I think I can rule out crank seals, but without doing a leak down I don't know for sure. I don't have the tools handy to do a leak down at the moment.

Can anyone give insight to This?
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Harbor

Harbor

Location
Stockton
The oring style cover leaks for me too. I run a gasket now with the oring. Silicone or grease the gasket, grommet to your pickups and the starter nose body to case if not already
 
mxhead

mxhead

Location
ontario
Harbor said:
The oring style cover leaks for me too. I run a gasket now with the oring. Silicone or grease the gasket, grommet to your pickups and the stars ER nose if. It already
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I have a spare fly wheel gasket. I will defiantly try running both now with grease on them. Possible it's coming in by the starter? Should it be removed and inspected?

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Harbor

Harbor

Location
Stockton
mxhead said:
I have a spare fly wheel gasket. I will defiantly try running both now with grease on them. Possible it's coming in by the starter? Should it be removed and inspected?

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If you don't see the silicone from the outside on the starter nose, yes pull it and and put a ring of sealant on the front starter case to seal it to the engine case.. also your black wire grommet, should have any unused holes siliconed shut...if not already

Your water box has a restricter too ? I see your pissers are restricted. Also My RRP water box, is raised so the top off box is at the carb air filter clamp height. Yours looked high too just couldn't tell from your other thread. Your ski looks well built and equipped by the way.

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mxhead

mxhead

Location
ontario
Harbor said:
If you don't see the silicone from the outside on the starter nose, yes pull it and and put a ring of sealant on the front starter case to seal it to the engine case.. also your black wire grommet, should have any unused holes siliconed shut...if not already

Your water box has a restricter too ? I see your pissers are restricted. Also My RRP water box, is raised so the top off box is at the carb air filter clamp height. Yours looked high too just couldn't tell from your other thread. Your ski looks well built and equipped by the way.

View attachment 342147 View attachment 342148
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Thanks man, the previous owner that built the ski sure took pride in this build!

I pulled the starter last night and noticed the o ring was broken. So that sure doesn't help anything. I have a spare starter that is broken and I compared the 2 to find out the nose of the starter is different? One has 2 o rings and the other has just one. I'm imagining that the starter with 2 o ring is the better one as it would seal better. I'm going to swap end caps tonight and also add gasket maker when reinstalling.

It is a RRP water box. With flow restrictor as well. I attached a better picture so your able to see. What's the benefit of having it high like This?
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Harbor

Harbor

Location
Stockton
Your box looks high too, that's good. You Don't want the water level in the box getting high enough to get into the stinger and run around the pipe into your rear cylinder. Maybe it's the pic but your water box restricter looks like a FC valve. What size is the box restricter and your other restricters ?
 
mxhead

mxhead

Location
ontario
Harbor said:
Your box looks high too, that's good. You Don't want the water level in the box getting high enough to get into the stinger and run around the pipe into your rear cylinder. Maybe it's the pic but your water box restricter looks like a FC valve. What size is the box restricter and your other restricters ?
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Haha your way passed my knowledge on these things. I'll PM you

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mxhead

mxhead

Location
ontario
JetManiac said:
It would have a black satin paint finish , stickered JetManiac, and engraved JM and a number on the front of the nose.
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One is satin black for sure. Trying to figure out why one has 2 o rings and the other just has one.
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augustaf

augustaf

Location
central florida
Either starter would do nicely. The one with the damaged/ cut o ring should of course have the o ring replaced (rather soft durometer). Important: degrease the flat area around the starter nose and apply a circular bead of RTV (silicone called by some) of at least 3mm thickness. Grease the o ring. also degrease the crank case area where the RTV will make contact.
 
mxhead

mxhead

Location
ontario
augustaf said:
Either starter would do nicely. The one with the damaged/ cut o ring should of course have the o ring replaced (rather soft durometer). Important: degrease the flat area around the starter nose and apply a circular bead of RTV (silicone called by some) of at least 3mm thickness. Grease the o ring. also degrease the crank case area where the RTV will make contact.
Click to expand...
I ended up switching front covers on the starters to the double o ring one. Cleaned up all surfaces good and installed with gasket maker on the surface that touches up against the engine case. Along with marine grease on the o rings. If water gets in somewhere now it has to be coming from the crank seal. Praying to the jet ski gods this isn't the case !

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S

SimonSimon

Location
Michigan
I had an issue with water in my flywheel cover before. Silicone'd the crap out of the gasket and starter oring and problem solved. I highly recommend doing a leak down test while you're at it.


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mxhead

mxhead

Location
ontario
Simonsayz27 said:
I had an issue with water in my flywheel cover before. Silicone'd the crap out of the gasket and starter oring and problem solved. I highly recommend doing a leak down test while you're at it.


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Unfortuanlly don't have the tools handy to do a leak down. Test or else I would. The liquid That's behind the fly wheel cover is a swamp water smell and has zero smell of fuel or oil. At this point all I can do is pray and on the off season do a tear down and confirm it's not the seals

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