3.7 mercrusier may be siezed

[Mustanglester67]

Hello I'm new here and hoping someone can help me. I purchased a 89 sunsport 186 baja last summer,the guy I bought it from said it just died on him out on the lake the summer before, and he had no idea why. Any how I bought it parked for the winter and was hoping to get it running this summer, went to try and start it today and it won't crank over, I put two bolts in the front of the crank shaft pulley to see if I could turn it by hand with a bar between the bolts, will not move. My question is what would be the easiest way to tell if it is in fact siezed.and what kind of cost am I looking at to have it repaired. Sorry for such a long post.thank you for the help
Mustanglester67

 

[Alumarine]

Welcome.
Remove the outdrive and see if the engine will turn,
The drive might be seized up.

Make sure throttle is in forward before removing drive.

 

[stonyloam]

Try adding some Marvel Mystery Oil and PB Blaster to the cylinders and let it sit for a few days. Might unfreeze.

 

[Mustanglester67]

Thank you I will try both suggestions.....soon as rain stops
Mustanglester67

 

[Scott Danforth]

If it stopped due to reversion and sat, you now have a boat anchor. Good news, a 4.3 can be dropped into its place with a little work