Removing Coupler and Midshaft - 1990 Superjet

jeremy bach

jeremy bach

Location
vancouver
Hey i just traded an old boat for a 1990 Superjet 650. On my 4th ride something got sucked into the impeller and now the coupler spins but the impeller does not spin.

Im was thinking there is probably a shear pin in it somewhere so i removed the drive shaft/pump and then i removed the midshaft housing bolts but i dont know how to get the coupler/midshaft out of the ski.

Can anyone tell me if i am on the right track or if i missed something here and what to do next.

Thanks guys
 
CRJ

CRJ

Hibernating
Location
Toronto
jeremy bach said:
Hey i just traded an old boat for a 1990 Superjet 650. On my 4th ride something got sucked into the impeller and now the coupler spins but the impeller does not spin.

Im was thinking there is probably a shear pin in it somewhere so i removed the drive shaft/pump and then i removed the midshaft housing bolts but i dont know how to get the coupler/midshaft out of the ski.

Can anyone tell me if i am on the right track or if i missed something here and what to do next.

Thanks guys
Click to expand...
motor has to come out to remove midshaft. you probably snapped your driveshaft, stripped the threads on the prop or maybe the splines in the midshaft. use google to see what its normally supposed to look like.
 
jeremy bach

jeremy bach

Location
vancouver
The drive shaft splines look good and the impeller is good so i guess its the midshaft needs to be replaced.

I guess ill give it a shot and pull the engine.

How hard is it to realign the engine and pump on reinstall?
 
T

txsuperjetfreak96

Location
amarillo ,tx
Its pretty simple just put shims back where they were removed, use feeler gauges to get proper gap between couplers, youll want 2 to 4mm of gap between fingers on couplers


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