Where to clamp off engine when towing?

[bobbobobbo]

Just to confirm, figure better to ask, where do I clamp when towing my jetboat? Twin 717 engines.

 

[Coastiejoe]

The manual for Ski's states: "Pinch the water supply hose from the impeller that goes to the engine."

Here is a picture of it from a Ski manual, it may be enough for you to figure it out...

 

[bobbobobbo]

Thank you!

 

[Coastiejoe]

Thank you!

Looking at your picture I can't tell which hose is coming and which is going,,, so I played it safe with a picture and text...

Someone will know for sure as I would think they are set up the same way as far as inlet and outlet goes. I just don't know which is which.

It is just a matter of tracing the hose back to the pump now...

You are welcome..

 

[LouDoo]

If you look closely at the head cover on the water inlets you will see small arrows, you will want to clamp the hose with the arrow pointing toward the motor, the other side with the arrow pointing toward the stern is the flush hose connection.

Joe, that's a pretty fancy hose clamp, I don't believe you can get those at Harbor Freight.

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

Lou

 

[Mekanix]

Why?

Will water moving through the pump make it all the way to the engine and pipe ?

 

[LouDoo]

Yes when towing over 5mph water can get into to engine and hydrolok the engine, personally I would clamp the line when towing at any speed.

Lou

 

[Mekanix]

Yes when towing over 5mph water can get into to engine and hydrolok the engine, personally I would clamp the line when towing at any speed.

Lou

learning something new every day

Thanks Lou

 

[Clirry]

Have to clamp the line every time i tow the boat?

 

[Coastiejoe]

Have to clamp the line every time i tow the boat?

Officially no. And most manuals say it is not required as long as you tow under 15 MPH.

That said, I would clamp it any time a tow is being done. Water in the engine is the enemy. The metal on the inside of the engine is extremely vulnerable to water due to how clean and unprotected it is. Rust happens within hours. Rust can easily destroy things when you start to crank the engine.


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[Coastiejoe]

Joe, that's a pretty fancy hose clamp, I don't believe you can get those at Harbor Freight.

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

Lou

I looked for two days trying to find that exact clamp,, couldn't do it...
The picture is right from the manual, the clamp is probably a Factory OEM item...

 

[Stevego]

Have to clamp the line every time i tow the boat?

Just so we are clear we are talking towing on/in WATER not on the trailer.

 

[jyoungun76]

:facepalm:

 

[Coastiejoe]

Just so we are clear we are talking towing on/in WATER not on the trailer.

That is correct...

 

[Stevego]

I know to clamp only on water. I think the guy above Clirry who asked may have been confused. Wanted to clarify for him not me.:thumbsup:

 

[Clirry]

Yeah, obviously noobie here... I rather to make double sure.

Stevego- thanks.

jyoung, shh...

:willy_nilly:

 

[Guest_User]

summit racing

Amazon...

 

[Stevego]

I have the plastic plier looking ones similar to the Amazon ones above. They do not work very well if you need a tight leak proof clamp as they are too flexy. Get the metal ones from Summit or other location.