Should I wait or replace my wear ring now

C

Carve Crazy

Location
Ft. Myers, FL
I recently brought back to life a superjet that was sitting for a while. Before installing the motor I noticed that there was some catching of the wear ring when turning the midshaft by hand. It wouldn't bind totally and with one hand I could push past the sticking areas. Anxious to get out on the water on a stand up again, I decided to be a cheapskate, dous it with wd40 and run it like it was. After a few minutes of erratic idling on the hose, the impeller or ring wore enough to not catch. I went out this past weekend for a test run and used about a half tank of gas. Ski pulled out of the hole strong. My question is--Is the damage already done to the prop (impeller)? Should I just run it like the way it is for a while, and just have the impeller redone from impros when I change the wear-ring. Or if I go ahead and replace the wear-ring before the next ride, is there a chance I could leave the prop alone without too much performance loss? To simplify this question- what wears more, the impeller or wear ring (stainless insert) when the ring starts to blister.
 
Big Kahuna

Big Kahuna

Administrator
Location
Tuscaloosa, AL
I use to have to grind my wear ring some from swelling, better that then the prop wear. Right now you are probably ok, But I would look into replaceing the WR and inspecting the prop.
 
C

Carve Crazy

Location
Ft. Myers, FL
how do i inspect the prop? Do I use a feeler gauge? If so what should the clearance be on a yamma 144. I have been searching, and is it the consesus that the delrin sbt wear ring is the best economical way to go?
 
Big Kahuna

Big Kahuna

Administrator
Location
Tuscaloosa, AL
Dave Parmelee said:
how do i inspect the prop? Do I use a ************ gauge? If so what should the clearance be on a yamma 144. I have been searching, and is it the consesus that the delrin sbt wear ring is the best economical way to go?
Click to expand...
But prop on a table with a speed square touching the blades. Rotate blades and see if there are any gaps around the area where it would have been rubbing.
 
C

Carve Crazy

Location
Ft. Myers, FL
Lol. who would have guessed the word rhyming with feyylor would be a cussword. :D

Thanks, but having a little trouble visualizing it. Without the ring, will the prop spin on its shaft without drifting on the table?
 
john zigler

john zigler

Vendor Account
Location
wisconsin
Being the impeller is thin at the outer edge they can/do wear. When they have substantial wear you typically will have a good "burr" at the outer edge. If you have a burr, your impeller will be out of spec. If you do not, you might be OK.

The only way to know is to put it into a new ear ring, and check tolerance. (Sorry I do not know the number of the top of my head, but it is minimal).

If your ski runs, with no, or minimal cavitaion, you are probably fine for now.
 
C

Carve Crazy

Location
Ft. Myers, FL
Thanks everyone. I looked up there with a flashlight last night and gaps looked (to the eye) nowhere near 6mm. I'll find some cardstock or something flexible that i could pre-measure the thickness cut a long strip and try to get an idea of of clearance without removing the pump. I haven't got around to ordering a wear-ring because I am undecided which one. I would rather not spend the $300ish on a solid stainless or new oem, but still hesitant on the delrin/vinly ones.
 
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