Tilt hose repair?

[Gus_Mahn]

My buddy has a 1990 Carvelle inboard Volvo Penta speed boat and the trim hose in the engine compartment has just failed after resting against the exhaust. The dealer told him that the engine has to come out to change the $50 hose. The melted portion is completely accessible. The hose reads 3/16” SAE 100R7 Tritan Hose and is fiber reinforced plastic. The ideal solution would be a couple of reusable end fittings that mechanically captures the hose and is tightened with wrenches. Unfortunately 3/16” seems to be an odd size, and I’ve been unable to locate a proper hose end other than crimp style. I’ve contacted local hose shops, and their portable crimpers struggle to do 1/4” hose. My friend has been told the system is 200psi. At this point I’ve ordered 316 barbed fittings and Oetiker Stepless Ear Clamps. I plan on heating the hose, pushing in the barb, and using two clamps on each end while warm.

Does anyone have some wisdom or any critique care to share?

 

[wings&wheels]

Other than I have learned that I will never own another I/O, I have no direct input. I will say though that I approach boat repairs such as this not with "Will it work?". but with "Where will I be and what will I do if it doesn't work?".

 

[Donald]

The 200 PSI is probably right.

Some boats have tight engine bays and you contort your self to reach engine parts along with scraping your wrists.

I have a 27' Chaparral and often sit in the engine bay working on the engine.

I would try to replace the hose in question.

But the boat will probably run fine without being trimmed. You may need a stick and manually lift the outdrive and then prop it up via a stick.

This hose runs from an electric pump off to the side of the engine through the hull to the trim cylinders on the outdrive?

 

[PontiacHO]

3/16 barb fitting with clamps

 

[Gus_Mahn]

The 200 PSI is probably right.

Some boats have tight engine bays and you contort your self to reach engine parts along with scraping your wrists.

I have a 27' Chaparral and often sit in the engine bay working on the engine.

I would try to replace the hose in question.

But the boat will probably run fine without being trimmed. You may need a stick and manually lift the outdrive and then prop it up via a stick.

This hose runs from an electric pump off to the side of the engine through the hull to the trim cylinders on the outdrive?

This is correct, but the fitting in knuckle can’t be changed without pulling the engine. He also can't get it on the trailer without being able to tilt the outdrive. The proper fix is a pair of reusable end fittings, and 3/16” was a little hard to find. I wound up getting suggested to try a place in CA. Two proper female nutted fittings and a coupler for $50 shipped. I can’t complain, and it should be good for the 3000 psi rating of the hose.

 

[Donald]

I am somewhat surprised the hose melted. The entire exhaust system is water cooled and there is typically a rubber connector along the exhaust path. While it does get hot it should not get hot enough to melt rubber.