Has anyone actually ordered one of these impeller housings? Precision Marine

[aflax24]

My impeller housing is swelling...time to change, has anyone actually procured one of these?http://www.precisionmarinetools.com/shopping_cart.php are they any good? Whats the quality or should I just go SBT?
I have seen a few folks reference them in other posts but no one seems to answer...

How long is it really gonna take me to do a housing...
This is the pump that I usually have to drill/pry stuff on...

 

[Bruce]

I talked to them in the spring but never got around to ordering. I plan to try them early next season.

At $85 per housing and $27 per replacement liner they are the least expensive option out there.

I theorize that some of us with impellers that do not have visible damage but lower than expected performance may have wear that has increased the diameter of the housing and decreased the diameter of the impeller. In that case simply replacing the housing while keeping the factory impellers may increase performance.

 

[4x15mph]

I use a similar version of this with the replaceable liner. I did have an issue with scraping/melting one on a stick and I think the OEM stainless might have just resulted in the stick being cut or stuck. Either way, I just replaced the liner. So far so good

 

[Big Shasta]

I use a similar version of this with the replaceable liner. I did have an issue with scraping/melting one on a stick and I think the OEM stainless might have just resulted in the stick being cut or stuck. Either way, I just replaced the liner. So far so good

This would be my concern. I'd stick with the stainless. My 05 spent all its life in saltwater and even with 10 years and ~250 hours on it, They were in great shape. Maybe I just got lucky but if they last that long without swelling and needing replaced, it's a win! I bet in that amount of time a piece of debris would have damaged a plastic liner a few times.

I didn't measure the gap but the bite and top end were still great.

 

[Murf'n'surf]

I agree with keeping stainless.... I flush and hose the heck out of the clean out tubes/tunnels and impeller housings and have no signs of corrosion or bulging.

 

[aflax24]

too late for me, I bought the boat and there was already some bulging...it seems to drag a bit on initial start.
Need to replace, think i am gonna give the cheaper option a go.

 

[Cobra Jet Steering LLC]

I have used the plastic s b t liner sections with good results, however keep in mind that as you run the boat with a bad liner you wear down the impeller edges if you continue to use the pump with the corrosion building up behind the liner you will wear down the edges of the impeller to the point that at the very least it will need to be rebuilt, if not it will cavitate pretty badly

 

[Cobra Jet Steering LLC]

the corrosion is caused by dissimilar metals. between the two metals a white aluminum oxide builds up and forces the liner to bulge. I have taken several apart just to see the amount of corrosion . personally I always swap over to the nylon liners since there is no corrosion build up because there is no galvanic corrosion taking place.

 

[Bruce]

I certainly will not put new impellers back into the factory pump housings. I would like to give the plastic lined version a shot. With the low cost of liners I would not mind changing them every year.

 

[Cobra Jet Steering LLC]

I put 150 hours on one in my ski with the supercharged / intercooled 1800 engine with no issues

 

[swatski]

I've just replaced mine OEM with the plastic one (bought through Impros) and noticed a SIGNIFICANT reduction in noise, very happy with it, but its only been ~20hrs.

 

[Gym]

What's involved in the replacement process? Has anybody documented the process yet?

 

[swatski]

What's involved in the replacement process? Has anybody documented the process yet?

@Gym There is a recent thread going on about it:
https://jetboaters.net/threads/who-would-be-interested-in-a-group-buy-on-impellers.5568/

@CrankyGypsy and others have documented it with pics.

 

[Gym]

@Gym There is a recent thread going on about it:
https://jetboaters.net/threads/who-would-be-interested-in-a-group-buy-on-impellers.5568/

@CrankyGypsy and others have documented it with pics.

Thanks @swatski. I have been following that post. I was more interested if anybody had done a step by step removal / replace post indicating various trouble issues.

 

[Cobra Jet Steering LLC]

Over time when anyone with a pump that uses a stainless liner, not just Yamaha but any make, especially in salt water use, it is very common for the liners to swell from dissimilar metal corrosion.
If the boat is used regularly you hear a ringing when the motor is run out of the water as on a trailer or lift. This wears the edges of the impeller slightly each time the boat is started, thus the noise on first start, or the drag on the starter on first start.
Running it then wears everything down both the liner and impeller.
However if you let the boat sit for an extended period of time and the liner swells a lot during that time, you may experience hard or slow starts even a lock up in the pump.
All this takes it's toll on the starter, driveshaft splines and impeller edges.
Placing a new impeller in a swelled up pump would be a fools errand.
Also replacing the pump liner but not the worn impeller would also prove to have undesirable results in the form of cavitation.
Just rinsing the pump usually won't stop the process, adding ZINC to the pump area will help reduce the effect.
The large block on the side of the pump from the factory is magnesium and not zinc so adding a second block to the right side of the pump can be a good idea, the shape has no bearing on it's effectiveness, I place round zinc discs on the ride plate of my skies and on the pump itself using a small bracket to attach the anode to the pump bolt.
Running a heavy wire from the engine block to a main bolt that goes through the hull used to attach the pump housing gives extra corrosion protection to the engine also.

 

[aflax24]

I ended up buying the precision marine housing for $100 shipped and it worked perfect, fit was great, fixed my rubbing issue and I just bought another for the other side. Highly recommend. Also to pry off the ring, I used a long 2x4 jammed in on the side of the pump and moved it around prying a little each time and eventually it popped right off. Just took a little leverage. Its an old jet ski trick I used to use.

 

[Marvin willis]

Do you have to send in your pump first? I think I'm about to order one too

 

[aflax24]

No you do not. I actually just ordered my second one. Worked great for me. I boat in Tampa Bay and am about to move up to Macon GA...
BUT I think it is a good product for the money, pretty sure they send the inserts if you do for some reason end up breaking one.

 

[Bruce]

No you do not. I actually just ordered my second one. Worked great for me. I boat in Tampa Bay and am about to move up to Macon GA...
BUT I think it is a good product for the money, pretty sure they send the inserts if you do for some reason end up breaking one.

Glad to hear it is working well!

Did you notice any performance improvement?

 

[aflax24]

Engine ran a lot smoother, and quieter...started easier as well. Mine wasn't all that bad when I replaced. Just swelling a bit.