Blaster Pump Install Issue

N

NINER

Location
Detroit
I took out my pump to replace my cracked pump show with an aluminum XR tech model. I am now trying to reinstall the pump and having some issues. It will slide in, I can feel the splines engage and then it stops. About half the splines are engaged judging my the grease pushed off the shaft. The front of the pump/pump seal is not even close to touching the pumpshoe, so it isn't that.
Anyone have any ideas or tips?
 
offroadenemy

offroadenemy

Location
Long Beach CA
I just did mine, I pulled the midshaft because of the same issue, I found that it only went halfway in. I put it together outside the ski to find that it slid in halfway way and had to be rotated a little and then it went in the rest of the way. Try that first so you dont have to pull your motor.
 
N

NINER

Location
Detroit
I tried your method by pulling the motor mount bolts and sliding the engine forward and found with a dry fit that I have to rotate the pump for the splines to line up. However I discovered another issue. The XRtech pumpshoe I installed is garbage. Dimensionally the thing is a piece of s**t. I spent hours filing it down during the install so it fit the hull properly, but I forgot to see how the pump would line up. I guess I figured for the price it would line up properly as long as I got the screw holes to line up and sit flat against the datum plane (flat surface the screws attach to).
I pulled the midshaft assembly and took off the pump seal and installed the pump in position. There is maybe a 1/8" gap at the top, and about a 1/4" gap at the bottom. Enough where I can get one dowel pin to line up, but not the other. Is it time to pull out a small angle die grinder and take some material off the top, or is it time for a new hull? The shoe is epoxied in with six10.
Does anyone know how far the pump seal groove should sit from the pump shoe? Hopefully I can remove some material to make it fit, but if the gap is too big, I am screwed.
 
D-Roc

D-Roc

I forgot!
Location
Dirty River Rider
Was there 1/8" of green Yamaha glue in behind the oem pump shoe when you removed it? I set my aluminum shoe with the pump seal removed and the two front pump mount bolts torqued. I left an even gap inbetween and all around the pump shoe and pump seal area on the wear ring. I should have tightened the 4 screws oozing out my pump shoe sealant a bit more creating a slightly bigger gap. I had to use a ratchet strap on my hull/ pump to compress the brand new pump seal enough to get my pump mount bolts in straight. No big deal and my pump seal is sealed real good lol. Sound like you have the opposite problem with yours. I feel your pain but it's hard to get it right the first time around. Sometimes it's the part and sometimes it's the installer. If you have an oem hull then you know it's the part. When you have an a/m hull it becomes a guessing game.
 
N

NINER

Location
Detroit
D-Roc said:
Was there 1/8" of green Yamaha glue in behind the oem pump shoe when you removed it? I set my aluminum shoe with the pump seal removed and the two front pump mount bolts torqued. I left an even gap inbetween and all around the pump shoe and pump seal area on the wear ring. I should have tightened the 4 screws oozing out my pump shoe sealant a bit more creating a slightly bigger gap. I had to use a ratchet strap on my hull/ pump to compress the brand new pump seal enough to get my pump mount bolts in straight. No big deal and my pump seal is sealed real good lol. Sound like you have the opposite problem with yours. I feel your pain but it's hard to get it right the first time around. Sometimes it's the part and sometimes it's the installer. If you have an oem hull then you know it's the part. When you have an a/m hull it becomes a guessing game.
Click to expand...
There was some glue behind the pump on the top. I removed all of the glue down to the fiberglass. Which doesn't make much sense because it is tighter on the top than it is on the bottom. I'm going to bolt my pump into the spare superjet hull I have without the seal and measure the spacing all the way around. That way I can figure out how much I have to take off the shoe and where. Hard lesson to learn. I'm more pissed that I didn't think to fit up the pump before I epoxied it in place after scraping glue and filing aluminum for hours. At least the superjet ran like a champ today.
 
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