Mechanical fuel pump for MerCruiser sterndrives For 50 years Sierra has been producing parts engineered to meet or exceed the specifications of marine engine manufacturers and has gained the confidence of engine manufacturers and boat builders to a point of supplying them with OEM parts. Boaters and installers can be assured a Sierra part will fit and restore function without compromise. This mechanical pump replaces pumps found on GM based V8 454 and 502 CID engines. It produces 6-8 PSI and meets manufacturers specifications for approved applications. Included mounting gasket makes installation straight forward. Key Features Engineered to meet or exceed OEM specifications Includes mounting gasket for easy installation Replaces MerCruiser 861677T and 818383T Backed by SeaStar Solutions Two-Year Limited Warranty The Sierra Engine Parts Selector In addition to fuel pumps, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see ourEngine Parts Selector, where you can search by engine make, serial number, model or year of manufacture.