99 Seadoo GTX Limited 951.2cc

[Chiro1]

I need to know where/how the water got into my cylinder's while flushing. Does that mean the water is coming in from head valve? (i have been thoroughly chastised already for improper flushing technique!:ban now i need to replace the o-rings that are the culprit. The ski now runs terribly has gone from 62 to 42 no power blah blah blah and wont idle. I am planning on pulling all the o-rings in pressure regulators? should i pull the head too?

 

[Chiro1]

Is there a kit i should buy?

 

[LouDoo]

I'm no expert on 951's but if it's like all the other SeaDoo engines it doesn't have a pressure regulator in the cooling system. Are you talking about a fuel pressure regulator for an RFI, or DI engine?

Lou

 

[Chiro1]

It is the two regulators on the heads. Stares at you in the face when you pull the seat off!

 

[El Toro 33809]

The GTX Ltd has carbs. The water could have gotten in the engine by running the hose after the engine was shut off.

 

[Chiro1]

That is it. that is when it happened. but i need some deeper info. where exactly is the water coming through? head gasket?

 

[LouDoo]

Are you talking about the rave valves, they have about a 2-1/2" round plastic black top with blue inserts about the size of a quarter?

http://fiche.seadoowarehouse.com/se...a Doo PWC GTX LTD CYLINDER - EXHAUST MANIFOLD

Parts, 21,22, etc.

Lou

 

[El Toro 33809]

Exhaust. Pull the plugs, ground the caps, crank the engine over for 5 seconds or so and see if water comes out. Wait 30 seconds and do it again. Put a little premix in each cylinder, the plugs back in, and try to fire it up.

Remember, start engine, water on. Water off, stop engine. Running them on the hose is actually having the water go through the engine in reverse.

If you get it running, perhaps you should fog the engine, then switch out the plugs after about 10-15 minutes.

 

[Chiro1]

Yeah, thats it. i was thinking i should replace those seals and the head gasket. I have lost engine power and cant get it to run past 42

 

[Chiro1]

Is there a whole kit?

 

[Chiro1]

SO- what i have been reading is the water is not jacketed around the cylinder heads. Correct? so then the water is dumping back through the open exhaust valves yes? then-- #1 why have i lost power? (replaced plugs) #2 anything else i have to do after dumping water in cyl.? and i am not sure what fog is? Eric

 

[El Toro 33809]

Fogging is getting extra oil in the cylinders and lower end.

Where in Florida are you Eric?

 

[Chiro1]

house --inverness and office in crystal river

any thoughts why my power is terrible after i replaced plugs after flooding?

do the regulators just pull out like the regulator on the exhaust system?

 

[Chiro1]

Where are you at El Toro? you must be in FL with 60% tomorrow? Anyone tell me if the 951 is water jacketed or water is coming in through open exhuast valves?

 

[ski-d00]

I think you need to understand the cooling system a little bit better. On seadoos, the jet pump will supply water via a hose directly to the exhaust pipe where it mixes with the exhaust gases which cools the very hot exhaust gases and then exits through the exhaust. So, if you put the ski on the running hose it will backflow directly through the exhaust pipe and into the cylinders which are just large open ports in the side of the cylinders. there are no exhaust valves that open and close like a 4 stroke, and don't confuse the RAVE valves as being exhaust valves, the raves just change the volume/pressure of the cylinder during compression/exhaust stroke. also from the jet pump water is supplied directly to the cylinders/head and are surrounded by jacketed water. this cools the cylinders directly just like your car.

I suspect you did some damage to your reed valves or possible piston/cylinder damage when you cranked the engine over when it was full of water and this is the reason for your lower speed.

step 1, check your compression and report back.

 

[LouDoo]

I guess I didn't understand your question yesterday, here is a diagram of the cooling system for a 787 your engine will be similar.

Lou

 

[Chiro1]

Thanks Lou! that is a big help!
Eric