1998 Sea-Doo Sportster 1800

[Jsineff817]

I have a 98 Sea-Doo Sportster 1800. Boat was running fine. Went to start it and one motor works perfectly fine the second motor wasn't turning over switched out parts and discovered the sylinoid on second motor was bad fix that and tried to run. Motor turns over great without spark plugs. Motor seizes when spark plugs are put in and torques like it's hitting a brick wall. What could be cause? Already tried switching plugs they are the correct size.


Update not seized after all. Added a little gas and a little oil to spark plugs and engine started to turn freely again back on track to putting this boat in the water where it belongs.

 

[dieselndoo]

Got a mpem with key fur that boat for first reference

 

[Jsineff817]

Update: Two beeps no start just click click on one sylinoid and no sound to the second. I replaced a sylinoid with a new one and she started right up ONCE! Now neither will turn over. I get two beeps when putting key on. I press button one will click sylinoid but no start the other nothing at all. Battery is fully charged. Any ideas?