1993 Seadoo XP PTO

[Landonheinberg]

Hello,

My PTO turns freely as much as it wants counterclockwise but when turning it to the right it will eventually catch after a couple rotations and stop turning. Why would this be?

 

[WhiskeyD]

Turning it clockwise is tightening it so it should bottom out and start to spin the crankshaft.

 

[Landonheinberg]

Turning it clockwise is tightening it so it should bottom out and start to spin the crankshaft.

How much pressure should I have to apply to get it to turn?

 

[WhiskeyD]

should be easy with the spark plugs removed. If not, remove jet pump and try again.

 

[Landonheinberg]

It sat for a very long time and was siezed yesterday. After spraying pb blaster in it it broke free and now it'd doing what I spoke above? Does that give you anymore ideas?

 

[Landonheinberg]

should be easy with the spark plugs removed. If not, remove jet pump and try again.

Jet pump isn't siezed. It seems the pistons are a little dirty and rusted. I took the top end off the block. I tapped on them with a wood block and hammer and they moved with some force

 

[mikidymac]

99.9% of the time a rusted engine is broken free the damage is done and the pistons and rings will finish themselves off when/if you get it to fire.

If it has been sitting you also need to do a full fuel system rebuilt.

 

[Landonheinberg]

99.9% of the time a rusted engine is broken free the damage is done and the pistons and rings will finish themselves off when/if you get it to fire.

If it has been sitting you also need to do a full fuel system rebuilt.

There is minimal rust and had sand in it

 

[mikidymac]

There is no way to get sand into the pistons....

Also if it turns one direction then "Catches" is is typically a rotary valve issue, I would pull the carbs and rotary cover and make sure nothing is jammed in the rotary valve like an air cleaner bolt (very common).

 

[Landonheinberg]

Okay I'll check that. I swear there was sand in there haha. It was in the side crevices not in the pistons directly but under the top caseing

 

[mikidymac]

Yes, sand in the water jackets is normal.

 

[Landonheinberg]

Yes, sand in the water jackets is normal.

So after soaking the pistons in pb blaster and cleaning them it now turns pretty easy but it gets stuck at 1 point of the full rotation and takes some force to continue into the next rotation of the pistons

 

[mikidymac]

Time to pull the rotary cover.

 

[Landonheinberg]

I'm gonna have to lift the engine to do that aren't I? I can hear scraping in one of the pistons right as it hits that stiff point. I was hoping an over night soak in pb blaster would possibly do the trick. Maybe rust on the side of the piston head? If not looks like I'm pulling the rotary cover off.

 

[Landonheinberg]

Time to pull the rotary cover.

You have to lift the engine block in order to remove the rotary cover right?

 

[WhiskeyD]

No. I think the old skis you have to remove the RV cover when removing the carbs.

 

[Landonheinberg]

No. I think the old skis you have to remove the RV cover when removing the carbs.

So take carbs out then I can access it without removing the block?

 

[Landonheinberg]

I ended up taking an Emory cloth and rubbing the inside of the cylinder sleeves for an hour. She's cranking over like a charm now

 

[Stevie96xp]

I ended up taking an Emory cloth and rubbing the inside of the cylinder sleeves for an hour. She's cranking over like a charm now

Nice she should run if the cylinders are smooth so it won’t eat the piston away