Part number 312781. This water pump to therm housing hose is for OMC Stringer & Cobra stern drive motors 1993 and older.

This water recirculation hose fits almost all Chevy and Ford V8 Stringers from the 1980's, many Cobra 1986-1993, and fits some Mercruisers.

This is a new OMC part, not an aftermarket. Sierra 18-71337 replaces OEM OMC 312781.

Over 500 inboards use this circulation pump hose. Please check your fittings.