motor wont turn over with the spark plugs installed

[gianni57]

Hello
My motor cranks very slow or wont turn over at all with the spark plugs installed but if I remove the plugs it turns over easily. Could this be the exhaust valves stuck closed? Any ideas would be appreciated. thanks

[chip]

which ski? 4-stroke

later cd

[gianni57]

Yes I should have mentioned that it is a 96 sltx.

[RedlineR6]

Make sure their is no water in it
Make sure the battery is fully charged

and if it won't turn over then, i'd be checking the condition of the starter motor, and all the cables are tight (grounds and all)

[bufaloz01]

I know im not no pro but if its turning over with spark plugs not installed the battery does not need much juice to do that but when spark plugs are installed the engine has to work harder to crank . Id say charge your battery or get a new one and it will crank with spark plugs installed.

[ph2ocraft]

57, what'd you find?

[gianni57]

Thanks for all the input. I will get a new battery tomorrow. The battery on the jet ski is dead, I was trying to jump start it. I will let you know. Again my thanks.

[gianni57]

Thanks for the help. You were correct it was the battery. Thanks for all the help.

[ph2ocraft]

Thanks for letting us know what corrected your issue!