Length of the rubber water hose from upper drive water tube to transom?

rhillman75

Petty Officer 2nd Class
Joined
Jul 28, 2010
Messages
176
So I have been working on an overheat issue with my 1989 Mercruiser 5.7 when I noticed the rubber hose from the upper drive to the transom had several cracks and breaks in it that were causing a water shortage not allowing the engine to properly cool. I got a replacement hose from the auto part store, cut it to length of the original hose and noticed that now it has a kink in it when the drive is in the full down position. I know that over time rubber hoses will stretch, so with that said, is there "scientific" method in cutting the new hose to the proper length or is this just a "cut a 1/4" off at a time until it doesn't kink method? I am putting the boat on our dock for the next 5 months this weekend and this is one of those things I know very little about and with a boat at 7,000 lbs I would rather not pull in and out while questioning the length of that hose being correct.
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,665
Ayuh,.... That hose, "Looks" like automotive heater hose, but it ain't,.....

It's somewhat stiffer,.....
 

crazy charlie

Vice Admiral
Joined
May 22, 2003
Messages
5,428
get the correct type of hose or the kink will be the least of your worries.Auto hose will fail .Charlie
 
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