Hi all, I just picked up a 94 seadoo SP from a client. It’s been sitting for god knows how long. He inherited it with a lake house, and since he planned to sell the house and wanted nothing to do with the SP he offered it to me for free if I could get it off the property for him. Upon getting it home, I opened it up, and it looks complete. I put a battery in and tried to crank, no surprise, it didn’t.. I pulled the electrical box out and tested all solenoid posts 12v at battery, y/r wire, and b/w wire. I jumped across with a screwdriver, and the started clunked but didn’t turn the motor. After a couple tries it turned a little, but very slow. I checked the cables and all look ok, as well as the connections. I pulled the plugs and tried to manually turn the output shaft but there’s a fair amount of oil and grease on it and I’m unable to. It did turn a bit from the starter so I don’t think anything is seized up. I want to crank it so I can check the compression before I put any money into it. The battery I’m using isn’t new so I’m concerned it not pushing enough amps. Anyone else have any ideas?
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94 seadoo sp no start
- Thread starter Danb413
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edchris
Member
When you say you couldn’t turn it with the plugs out, did you mean it was too stiff to turn?
if so, that’s bad news, it should turn very easily with no plugs installed as there is no compression.
if you meant it was too greasy to get a grip, then try to spin it with good battery.
DO NOT hook a battery charger/booster up with the battery installed, you will probably fry the MPEM, & they are $$$.
If a proven battery won’t spin it, either the starter motor is bad,(possibly corrosion from sitting), or the engine or drive shaft is seized.
if so, that’s bad news, it should turn very easily with no plugs installed as there is no compression.
if you meant it was too greasy to get a grip, then try to spin it with good battery.
DO NOT hook a battery charger/booster up with the battery installed, you will probably fry the MPEM, & they are $$$.
If a proven battery won’t spin it, either the starter motor is bad,(possibly corrosion from sitting), or the engine or drive shaft is seized.
Thanks for the help. So with the plugs out I kept jumping the solenoid, and eventually it started cranking. I checked compression and I have about 125psi in each cylinder. I replaced the mpem and starter solenoid, but still won’t start from the button. I then grounded the plate in the electric box to the battery and the button would turn it. Checked for spark and I have spark in the rear cylinder, but couldn’t tell from the front. I have a manual, but I’m not electrician and am having a hard time figuring out how the grounds are supposed to be. Once I get see spark at both plugs I’ll start tearing into the carb.
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