Cooling hoses

[Bayou Dave]

Are their any USCG regs regarding what type of cooling hoses to use on a raw water cooled I/O engine? If not, will using auto cooling hoses be ok for a saltwater boat?

 

[alldodge]

Re: Cooling hoses

There are no safety issues with cooling hoses and I know of no USCG regs (My opinion). Auto hoses are not designed to handle salt so the only issue is whether they hold up as well and if this could cause your boat will sink. That said I do see most auto cooling hoses made from the same materials

 

[MarkSee]

Re: Cooling hoses

I think it may also depend on which hoses you might be looking at replacing.

If you had a package with a Bravo drive with the water pump engine mounted you'd see this really thick, hard to bend hose going from the transom to the water pump. Not nearly as thick hoses through the rest of the system but you can see they are re-inforced not just simply rubber.

I know the hoses I replaced for my engine to water heater connections had some kind of rating stamped on the hose so you might want to see what yours show and make sure replacements are rated at that level or higher.

Mark

 

[Bayou Dave]

Re: Cooling hoses

I think it may also depend on which hoses you might be looking at replacing.

If you had a package with a Bravo drive with the water pump engine mounted you'd see this really thick, hard to bend hose going from the transom to the water pump. Not nearly as thick hoses through the rest of the system but you can see they are re-inforced not just simply rubber.

I know the hoses I replaced for my engine to water heater connections had some kind of rating stamped on the hose so you might want to see what yours show and make sure replacements are rated at that level or higher.

Mark

I'll need to check the rating stamp on my hoses. The one I really want to change is for the water pump.It looks very old and is very pliable.
Anybody else want to chime in about saltwater eating auto hoses?

 

[Fun Times]

Re: Cooling hoses

I'll need to check the rating stamp on my hoses. The one I really want to change is for the water pump.

Are you wanting to change the hose going between the water pump to the thermostat housing?

Merc part number 87108 Hose, Molded, thermostat housing to water pump is also available thru iboats if interested, Molded Hose 1 3/4"ID 12 3/4" Length for Volvo Penta, Mercruiser 32-33189 32-87108, OMC Sterndrive Cobra - Sierra 18-71337 - iboats

I'm not sure on your engine model but keep in mind that some of the hoses between the water pump/thermostat housing were wire reinforced.

 

[Bondo]

Re: Cooling hoses

Are you wanting to change the hose going between the water pump to the thermostat housing?

Merc part number 87108 Hose, Molded, thermostat housing to water pump is also available thru iboats if interested, Molded Hose 1 3/4"ID 12 3/4" Length for Volvo Penta, Mercruiser 32-33189 32-87108, OMC Sterndrive Cobra - Sierra 18-71337 - iboats

I'm not sure on your engine model but keep in mind that some of the hoses between the water pump/thermostat housing were wire reinforced.

Ayuh,.... I put 1 of them automotive corrugated type, will fit, accordion hoses on my 4.3 years ago,...

It's still there, but I'll Never do it again,...

The Right hose ain't always in the way of doin' whatever I'm doin' on the motor,...

 

[Bayou Dave]

Re: Cooling hoses

Are you wanting to change the hose going between the water pump to the thermostat housing?

Merc part number 87108 Hose, Molded, thermostat housing to water pump is also available thru iboats if interested, Molded Hose 1 3/4"ID 12 3/4" Length for Volvo Penta, Mercruiser 32-33189 32-87108, OMC Sterndrive Cobra - Sierra 18-71337 - iboats

I'm not sure on your engine model but keep in mind that some of the hoses between the water pump/thermostat housing were wire reinforced.

That is the one I really need to change and probably will buy it at iboats.. There are other hoses at 1" i.d. that I may change also and can get that size at an auto parts store. But want to make sure the 1" ones at the auto store will stand up to salt water.

Bondo.. has the corrugated one you put on been run in salt water?

 

[Bondo]

Re: Cooling hoses

That is the one I really need to change and probably will buy it at iboats.. There are other hoses at 1" i.d. that I may change also and can get that size at an auto parts store. But want to make sure the 1" ones at the auto store will stand up to salt water.

Bondo.. has the corrugated one you put on been run in salt water?

Ayuh,.... 4 or 5 days outa 15 years or so,....