Replacing Motor Mounts, What Else to Check?

brapperdoodle

brapperdoodle

Location
Asheville, NC
With a trip to the Daytona Freeride, I picked up my first Superjet. I looked for a while and after deciding to come to Daytona I finally picked up a 1995 Yamaha Superjet with a 701, Factory B Pipe, Footholds, AC -2" Aluminum Pole, Solas prop, Pro Tec Rideplate/Grate. Found it on the Orlando craigslist. The ski hasn't been ridden in a while and needs some love. Cranks up and runs but I haven't ridden it yet due to a broken motor mount. I just got in some parts including 4 OEM motor mounts. I plan on replacing them tomorrow, but while I have the motor out, is there anything else I should check? I'm newer to stand up skis but not power sports so any information would be greatly appreciated!!! I plan on reinforcing and painting the ski later and the motor will obviously be back out, so I'm just curious what I should check mechanically or electrically before a first ride. Nobody wants to get stuck out on the lake right? Haha thanks :cool:
 
vomitspot

vomitspot

Location
mobile alabama
be sure you get the motor aligned or it will eat the drive shafts
08 and up have a 5 th rubber block to aid in motor support
sits under the motor
maybe rebuild the carb since its been sitting
new diaphams never hurt
 
V

Vortex

Location
Southeast
When the mid is splined into the driveshaft it can seem good and still have wear.

If you want to rebuild it read jet maniacs' FAQ and their rebuild service is excellent.
 
brapperdoodle

brapperdoodle

Location
Asheville, NC
Vortex said:
When the mid is splined into the driveshaft it can seem good and still have wear.

If you want to rebuild it read jet maniacs' FAQ and their rebuild service is excellent.
Click to expand...
Awesome thanks. Rebuilding it consists of replacing a couple seals and bearings correct? I have nice bearing removal and installers in the toolbox so it should be no problem. But I do need a special tool for coupler removal and prop removal right?
 
V

Vortex

Location
Southeast
brraaapperdoodle said:
Awesome thanks. Rebuilding it consists of replacing a couple seals and bearings correct? I have nice bearing removal and installers in the toolbox so it should be no problem. But I do need a special tool for coupler removal and prop removal right?
Click to expand...

The rebuild process of the mid bearing housing is somewhat nuanced, I can't say much about it as I had JM handle that.

The pump can be left in the hull. You just remove the 3 bolts holding the mid, carefully making note of any shims that were there and their specific location. It may take a little persuading to get the mid out as there is a bead of silicone sealing it to the hull.

To remove the coupler from the mid you need a spline tool (some make one from a old driveshaft with a nut welded to it) that goes into the back end and either the 'shamrock' 3 finger coupler socket or some guys use a long breaker bar across the fingers. It has regular clockwise/lefty loosy threads. JM can handle this for you if sent in for rebuild.

With the mid isolated from the pump you can better gauge it's mechanical condition.
 
mikidymac

mikidymac

Location
California
There is no reason to remove the coupler to rebuild the midshaft. Just make sure you accurately measure how far it sticks out before you take it apart so you can set it back to the same depth.
 
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