Dont forget to clamp cooling hose when being towed

[Harshhobgoblin]

Hopefully you'll never need this information, but I learned (while researching my other timing chain thread) that you need to clamp your cooling hose when being towed over 10mph to prevent flooding your engine. When your motor is off towing can force water up through the normal exhaust manifold cooling loop and into an open cylinder.

This could turn a little problem into a big one, so I wanted to share! If anyone has more information please elaborate where and how to clamp.

 

[Bennie]

@OperationROL had a good write up on installing some valves to assist with that exact situation. (on my to-do list)

https://jetboaters.net/threads/how-to-add-a-shutoff-valve-to-your-boats-cooling-system.411/

 

[captras]

Reading this thread is good info. I like the idea of being able to not just crawl back to the dock if 1 engine fails. I found these hose clamps at Harbor Freight that look like they would be just the thing, without the danger of damaging the hoses.

http://www.harborfreight.com/4-piece-fluid-line-clamp-set-65116.html

 

[ruztew]

I've been towed in before and didn't have the clamps... SeaTow actually asked if I had clamps and seemed annoyed I didn't... They towed back in slow. Just to be extra careful, before I cranked the engine afterwards I pulled all the plugs and cranked it (this would allow water to fly out the spark plug hole and help prevent hydrolock), no water shot out so I knew I was good. Picked up a clamp from Amazon and keep it in the glove box now

 

[Big Shasta]

I always kept 2 of these on the boat. Had to use one once, worked prefect. Lost an impeller bearing on one side.

 

[ISLANDRACING]

The TOW VALVE KIT is available from Island Racing:

 

[Buckeye Boater]

Stupid question time. Can anyone point out on an AR192 the exact point where the hose should be clamped off?

 

[Bill D]

This doesn't show the exact location on an AR192, but it has tons of information on the cooling system and pictures of where to install the valves/clamps.

https://jetboaters.net/threads/how-to-add-a-shutoff-valve-to-your-boats-cooling-system.411/