Which hose to pinch off on brp 250 engine?

[Pinhacker71]

I have a Scarab 215 HOI and cannot figure out which hose I should pinch off if I need to be towed. My manual has a photocopy explaining what to clamp, but it is of such poor quality I can't make out anything. I recently returned to the dock after one impeller sucked up some wood chips and did not clamp off the engine that was powered off. I don't want to chance that again. Thanks.

 

[Speedling]

I didn't think you had to do that since it was a closed loop system?
I could be wrong of course. But in any case it would take a good bit to get in there!

 

[smashedheadcat]

This was posted up a few months ago, hope it helps: https://jetboaters.net/threads/towing-disabled-jet-boats.7024/#post-121018

 

[ChrisM]

Just think of the Rotax as a car engine, the engine block, and cylinder heads are cooled with a closed coolant system, the exhaust in cars would be air cooled, the Rotax cools their exhausts, and some of their inter-coolers with raw water. When the Rotax engines are running, exhaust pressure works against the pump pressure to keep the water from getting the exhaust manifolds, and into the cylinders. I'll assume Scarab is the same as Chaparral with the required Catalytic converter(s), which is also water jacketed, and kept cool with water. Seadoo has not been consistent with marking the pinch off point with a red rubber ring around the proper hose. Some years have it, some don't.
I required a tow from friends while I had my Seadoo out, a sliver of wood was embedded in the wear ring, couldn't go over 8-10 MPH, didn't have the pinch off tool, so I stayed on the craft and left the engine running at idle, which is acceptable.
http://watercraftjournal.com/vicious-rumors-and-vile-gossip-are-catalytic-converters-in-pwcs-future/

 

[Slugger55]

http://www.ebay.com/itm/like/110956570404?lpid=82

 

[ALAN MANN SR.]

On the 250 with catalyst it requires two, one on the hose going to the exhaust manifold, and one on the hose going to the intercooler.