water in cylinders

[gerricky]

i borrowed a friends 1999 bombardier. he just had the impeller replaced. when he took it to the lake it would only idle and stall when throttled up. my buddy and i thought we might be able to horse around with it and get it going. new plugs, new fuel and oil. didn't change any filters or anything. starts fine but same problem only idles stalls when throttled up. we decided to bring it with us for the weekend and mess with it some more. i towed it behind my 46' silverton up to watch hill rhode island.about 35 miles on the water.when we got there it wouldn't even turn over. come to find out the cylinders were full of water. took out spark plugs and turned it over to blow out cylinders. i am dropping it off at the shop this week cause i am obviously over my head but does it make sense for water to get in the cylinders because of towing on the water?:cheers:
rick

 

[kustomkarl]

Rick, you can't tow any seadoo over the speed of 15 mph as it will force water into the cooling lines and flood the engine.The engine needs the back pressure from the engine running to keep the water from backing up from the exhaust system and into the engine. If you do tow it over 15 mph you need to pinch the intake cooling line at at the jet pump.

Karl

 

[nswillin]

Makes all the sense, b/c that's what happened. Special precautions should be taken when towing a Sea-Doo in water.
Maximum recommended towing speed is 15 MPH.
When towing your watercraft in water, pinch the water supply hose from the
impeller housing to the engine with a large hose pincher. This will keep the cooling system from filling and will lead to water being injected into and filling the exhaust system. Without the engine running there isn’t any exhaust pressure to carry the water out the exhaust outlet. If you don't do this it might cause damage to the engine. If you have to tow in water and do not have a hose pincher, be sure to stay well below the
maximum towing speed of 15 MPH.
If the shop can get the water out quickly then you might be ok.:cheers:

 

[gerricky]

karl, thanks, i wondered why i never see anyone dragging their seadoo although a guy on my dock always tows his jet boat. must be set up differently. so no flooding.
this is actually good news, as i was thinking a possible head gasket or cracked head or something. thanks again. rick:cheers:

 

[kustomkarl]

If the seadoo shop is getting it running for you he should clean the carbs too, so it will run the way it should. It sounds like it has dirty internal carb filters.

Karl

 

[gerricky]

when i got the seadoo home i took out the plugs and blew into the cylinders with a compressor to clear out the remaining water, also flooded the cylinders with wd40, then crank it over for a short period. i figured i wouldn't be able to get it to the shop right away.
i'll definitly make sure they clean carbs and replace all filters. no that i have the parts microfiche i'll be able to check up on them.

 

[derek]

crank it more. lots more. try to get it to start. this is all the shop is gonna do anyway. and it is in their best interest to let it sit until the water damages the motor. then you are out the price of an engine-plus install-plus you are out the rest of the season.