Just did a pump swap

[Bigboyfx1]

And it has so much cavitation that it wouldn't even pull me up on my fx1 anyway I know it's because I didn't seal it to the hull what is the best long lasting sealant to use I don't have any plan to pull it out since my pump mods are all done but I don't want to use 3m 5200 either

 

[DAG]

Ultra Black is awesome!!

 

[thomps33]

Yup, Ultra Black!

 

[Bigboyfx1]

Huh I had read somewhere that rtu silicone wasn't good enough that it would blow out.... I could be thinking of home depot style Base caulk too

 

[special fx]

Permatex clear is all I use and it has never failed me. Make sure all surfaces are clean.

 

[Pablo]

Sheeeat...I use standard silicone and it works fine. Like @special fx said, clean surfaces are a must.

 

[Proformance1]

Ultra Black is not silicone window caulk LOL best stuff for pump seals

 

[Pro-pulsion]

I've never used silicone to seal my pump and it has always had amazing hookup. A new pump seal for between the hull and pump works wonders. In fact, I have pulled out three pumps over the last 6 months including mine all without having been siliconed in and never heard any complaints about cavitation. I was just out for a quick ride tonight actually after re-installing my pump and getting my ski running for the first time this year, the thing hooked up like mad.

 

[badvinny]

I t

I've never used silicone to seal my pump and it has always had amazing hookup. A new pump seal for between the hull and pump works wonders. In fact, I have pulled out three pumps over the last 6 months including mine all without having been siliconed in and never heard any complaints about cavitation. I was just out for a quick ride tonight actually after re-installing my pump and getting my ski running for the first time this year, the thing hooked up like mad.[/QUOTE
I think he did a Kawi pump swap so there is no pump seal.

 

[Pro-pulsion]

???
I t?
Internet tech? I don't get it lol, am I missing something?

 

[blasterdude]

I've never used silicone to seal my pump and it has always had amazing hookup. A new pump seal for between the hull and pump works wonders. In fact, I have pulled out three pumps over the last 6 months including mine all without having been siliconed in and never heard any complaints about cavitation. I was just out for a quick ride tonight actually after re-installing my pump and getting my ski running for the first time this year, the thing hooked up like mad.

He did a kawasaki 650 pump swap there is no seal on them, you seal the pump in with silicone.


http://m.autozone.com/sealants-glue...silicone-adhesive-sealant/82548_0_0?location=

 

[Pro-pulsion]

Ooh, he left out that part lol

 

[badvinny]

???
I t?
Internet tech? I don't get it lol, am I missing something?

I was posting he had done the kawi pump swap and my poor internet connection took a poop, lol!

 

[Nottjbarlow]

"The Right Stuff" I think its from Permatex.....

Lets you seal the pump and its safe to ride in an hour. Never let me down.

Great for Saturday morning fixes.

 

[Vortex]

Could try 3m 4200 or 4000 that's their medium strength removable marine sealant

 

[Bigboyfx1]

Could try 3m 4200 or 4000 that's their medium strength removable marine sealant

This is what I was wondering too

 

[JetManiac]

I've never used silicone to seal my pump and it has always had amazing hookup. A new pump seal for between the hull and pump works wonders. In fact, I have pulled out three pumps over the last 6 months including mine all without having been siliconed in and never heard any complaints about cavitation. I was just out for a quick ride tonight actually after re-installing my pump and getting my ski running for the first time this year, the thing hooked up like mad.

If pump is installed square and tight to shoe with a new or good condition pump seal, then no sealant is required. However, sealant is good insurance against an airleak in this critical area. This is a high suction area and leaks can also develop as the rubber seal ages over time as well.

 

[Pro-pulsion]

Yes sir, I found that out a couple of seasons ago. My impeller wash was a boiled mess and no hook up lol. It is neat to see how the impeller boils the water though, the bubbles do not come out streamlined the way they normally do way down the draft trail, they stay close and roll up in huge bubbles...like you are trying to ride in a keg of boiling water.

 

[Bigboyfx1]

Yeah I'm rocking a 650 pump swap I got it pretty tight but there is for sure a 1/16 air gap around the whole shoe... I'm perplexed as to how air gets there tho I would think the pump area under the ride plate wouldn't have air there.... But if captain jack sporrow can walk on the bed floor using a conoe for air anything is possible lol

 

[Bigboyfx1]

Sorry to bring this up again but do I want to flood the area behind the shoe so it sqezzes out as I set the pump or just seal it like you would when installing base like in a house or caulking Windows??? With the pump already bolted in. I feel like it would be good to fill that area a little but it sure will be a nightmare to pull the pump if I do.