Any mechanics/motor machinist?

[Eagle19]

I buy boats and fix them up and flip them. I've got a potential boat that has a blown cylinders. He said it's not locked up but the guy got drunk and started the motor up out of water and it burned up the Pistons. My question is how much does it normally cost to bore out a outboard motor head? Everywhere I've read said $30-100 per bore....just wondering if it would be more cost effective to get a different motor.

[Walker]

You need to pull the heads and see how much damage to the cylinders. Ive done a bunch the only needed a good honing. Wisco pistons are the cheapest way to go for replacement.

[Eagle19]

Yeah I considered that as an option if it's not bad, kinda preparing a budget for the worst. I could get another motor for about $700. So I figure if it comes down to boring it and it's $100 a bore I'll probably just buy a different motor.

[Walker]

What motor is this?

[Eagle19]

Waiting for a message back but I'm pretty sure it's a 81-98 omc/Johnson/evinrude 90hp. I've heard they are really good motors. If I did do a rebuild it would be like having a new motor though too. Kind of a toss up.

[Walker]

Only be like a new motor if you replace crank bearings and wrist pin sets. Not really needed usually.

[Walker]

If its true that it.burned up because it eas run out of the water then I suspect the only damage is to pistons and cylinders

[kingranch]

I used to pay 50 per hole in corpus
.. u may want to double check it can be bored...alot of outboards and watercraft I worked on were nickasil lined...kinda like a chrome nickel alloy coating the bore. You usually couldn't bore unless u purchased an aftermkt sleeve and bored/press fit it in there instead

[MadHatter]

Sorry I haven't got back with you yet Eagle. Still looking for the titles. We are in the middle of moving and things are not where they should be. In the mean time, here is a pic of the cylinder/piston. Maybe someone can offer some better advice. From what I understand, it will have to be sleeved.

[MadHatter]

There are no noticeable scratches, or deep gouges in the wall. You can see where parts of the piston melted on top. You can turn the flywheel and all pistons will cycle, smooth as butter. You can't feel, or hear anything that sounds like metal on metal.

[Walker]

There are no noticeable scratches, or deep gouges in the wall. You can see where parts of the piston melted on top. You can turn the flywheel and all pistons will cycle, smooth as butter. You can't feel, or hear anything that sounds like metal on metal.

Then you can hone them and new pistons. You should be good to go. Those motors can be bored if necessary.

[Eagle19]

There are no noticeable scratches, or deep gouges in the wall. You can see where parts of the piston melted on top. You can turn the flywheel and all pistons will cycle, smooth as butter. You can't feel, or hear anything that sounds like metal on metal.

Is it a v4 or just 2 cylinders?

[Walker]

Its a v4 90degree crossflow.

[Walker]

Okay, im a bit mixed up here. Two people posting about a motor. Is it the same motor or two motors. The picture is of a 4 cylinder crossflow.

[Eagle19]

Okay, im a bit mixed up here. Two people posting about a motor. Is it the same motor or two motors. The picture is of a 4 cylinder crossflow.

It's the same, I'm buying the boat from him. Hahah