Thread: jet pump engine allignment woes
08-23-2010, 11:10 PM #1
- Join Date
- Aug 2009
jet pump engine allignment woes
hey guys 93 sl 750 trying to get this thing alligned correctly...the coupler is too high, there are no shims on the pto end engine mounts above or below the rubber puck, the pitch seems to be right on so shimming the mag end mounts won't work. do i have to take the engine out and grind the mount plate on the pto end or can something be done with the pto end motor mounts themselves?
08-23-2010, 11:35 PM #2
Hmm, are there possibly washers between the motor mounts and the bosses in the hull?
How much is the "too high" that we're talking about? A couple of SS fender washers stacked between the motor mount and the bed plate on hte MAG end will
make major changes on the PTO end. I'd suggest you throw a single washer in the front and see where you stand.
08-24-2010, 10:07 AM #3
- Join Date
- Jul 2007
- near Toronto, Canada
Is the through-hull bearing in place? Sometimes the through-hull assembly can push the shaft around. Remove it while checking alignment with the alignment tool.
The rubber hose mounted through-hull bearing must align with the drive shaft AFTER the shaft/engine alignment is checked (and corrected if need be).
Do you still have the original 1993 non-modular 146mm jet pump installed?
If yes, now might be a good time to upgrade to the better 1994+ modular 148mm jet pump (with a 148mm SL750 impeller). The 148mm jet pump is more efficient, so more thrust from the same engine power.
08-24-2010, 05:02 PM #4
- Join Date
- Oct 2006
- Cleveland OH
In extreme cases, I have had to grind the engine plate a little bit.
And if that didn't work, then I installed a washer between the top of the pump and hull. (1 washer at the top should do it. The large O ring should still seal fine with a 1/16" washer shim)
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