Above Forum Ads

**mikel70** · 01-01-2006, 04:32 PM

Vacume leak. check your crank seal.

**geraban19** · 01-01-2006, 05:22 PM

I can tell U that when it first seized I maybe had a seal failure... So it got brand new seals when this happened.

It is a good start to check other air leak issues.

Gera

**RX951** · 01-01-2006, 06:00 PM

got any pics of the cylinder?

**Hydrotoys** · 01-01-2006, 07:06 PM

Welcome Gera,
I hope we can help you with your problem. You will get bunches of questions and opinions. It would help if you can provide as much detail as possible.

Year/Boat?
Hours on engine since last failure?
When did it happen? What were you doing?
Water in hull?
Rear coupler plastic cover in place?
Aftermarket flame arrestors? Water socks?
Oil Injected or Premix?
Fresh gas? How long in tank?
Have the carbs been inspected or rebuilt?
Has the engine been pressure tested?

**geraban19** · 01-01-2006, 07:43 PM

Originally posted by hydrotoys

Welcome Gera,
I hope we can help you with your problem. You will get bunches of questions and opinions. It would help if you can provide as much detail as possible.

Year/Boat?
Hours on engine since last failure?
When did it happen? What were you doing?
Water in hull?
Rear coupler plastic cover in place?
Aftermarket flame arrestors? Water socks?
Oil Injected or Premix?
Fresh gas? How long in tank?
Have the carbs been inspected or rebuilt?
Has the engine been pressure tested?

Year/Boat? 2001

Hours on engine since last failure? Rebuilt when 70hs. ptoblem again after 5 hs. I don't ride this PWC toomuch.

When did it happen? What were you doing? I had recently swap the acc pump and install 110/120 jets... later changed to 125.

Water in hull? NO. ANY.

Rear coupler plastic cover in place? YES

Aftermarket flame arrestors? Water socks? STOCK.

Oil Injected or Premix? Oil injected. I was running premix too. I just lend it to a friend and he didn't add oil. But he rode 15mins and it doesn't look lubrification problem.

Fresh gas? How long in tank? FRESH..

Have the carbs been inspected or rebuilt? YES. I will re-check it.

Has the engine been pressure tested? NO.

The only modification is the IMPELLER.

I will repeat: When this happened front and 2nd cyl PV wasn't working because a pin came out.

We are very confused. This engine is a little hard to work since U don't have to much acess to it without disassemble everything. I am an YAMAHA fan but I am really missing my 1999 GP1200 that never failed.

I am really in love with this web site. U guys are so technical and helpfull.

thanks,

Gera

**geraban19** · 01-01-2006, 07:46 PM

Originally posted by RX951

got any pics of the cylinder?

No. Sorry. It was sent to be fixed.

Thanks,

Gera

**Hydrotoys** · 01-01-2006, 08:20 PM

Gera,
so you have different problems in all three cylinders?

**geraban19** · 01-01-2006, 08:28 PM

Sorry for the misunderstood.

I had 2 times the PTO cyl seized.

Gera

**Hydrotoys** · 01-01-2006, 08:52 PM

Gera, that sure looks and sounds like an air leak. I'd say if you put it back together like that again, it will just burn up another piston.

**geraban19** · 01-01-2006, 09:26 PM

Mark,

It can be cause by a gasket or something like this?

What's the point??? Recheck the whole engine and use a lot of glue as I saw yours?

Gera

**great lakes gpr 1200** · 01-01-2006, 09:39 PM

presure test the engine... I'm betting theres a leak. same cylinder right!?

**Hydrotoys** · 01-01-2006, 09:42 PM

Gera,
You need to pressure test that engine. Basically it needs to be air-leak tight. If not, you will burn a 3rd piston and cylinder.

To do this, you will need to reassembly the cylinders and head. Block off the exhaust, intake and pressure the engine to 10psi. If it leaks down to 0psi, then find the leak and repair. This is not easy to do with engine in ski. You might consider removing engine to do this.

**geraban19** · 01-01-2006, 09:44 PM

YES. Same rear/PTO cylinder.

1st time when it happened I didn't take care when rebuilding since I thought it was caused by a new jetting since I didn't open the rear cyl carb a bit more than other 2 as is recomended.

Now, in the middle of the week, I will be assembling it and now I have many things to check.

Gera