Water through pump inserts

[fischer550]

I remember somebody saying if you don't put silicone in the inserts where the pump bolts up on a yamaha, then water can get in your foam. Is this true?

 

[OCD Solutions]

The tops of the inserts should be sealed from the factory with a glob of resin but if you have ever run a longer bolt up in there and "popped" the resin, then yes, you can get water up into your hull and foam.

Some use silicone, some use antisieze. I used to use Lucas Oil Red and Tacky #2 grease but it washes out over time so I switched to using the silver antisieze in pump, rideplate and motor mounts.

 

[fischer550]

I'm confused cause I have an fx1, and the tray is not flat, there are 4 indents where the bolts go through. If the bolts were too long, wouldnt they just go through too long and poke your feet?

 

[yamanube]

I'm confused cause I have an fx1, and the tray is not flat, there are 4 indents where the bolts go through. If the bolts were too long, wouldnt they just go through too long and poke your feet?

Yes, that general statement is for superjet's, your inserts just sit in your tray rather than being encapsulated inside the hull.

 

[augustaf]

I use blue Loctite on those fasteners, helps in 3 ways: it seals (water wont get past threads), locks fastener, and since you're dealing with 2 dissimilar metals- prevents galvanic corrosion.

 

[Yami-Rider]

Silver anti-seize for me.

 

[fischer550]

Yes, that general statement is for superjet's, your inserts just sit in your tray rather than being encapsulated inside the hull.

So, does this mean the "popping the resin" theory is only true for the ride plate bolts, not the pump bolts? (for sj and fx1)

 

[OCD Solutions]

That would be correct. I think the FX-1 is about the only craft that is the way you described.

 

[fischer550]

Sweet. It is also on my 550sx I noticed.