Select Model Group
|3.9LD [PORT]||5.7L [SKI]||7.4L|
|3.9LD [STARBOARD]||5.8LD [PORT]||7.4L [CARB]|
|5.7L [350MAG.SKI]||5.8LD [STARBOARD]||8.2L|
|5.7L [CARB]||642D||8.2L [CARB]|
MERCURY PARTS CAN ONLY BE SOLD AND SHIPPED TO ADDRESSES WITHIN THE UNITED STATES.
Your 1991 MerCruiser inboard motor has thousands of hours of use to its name and it's not longer the fresh new engine used to be. If you want it to last you for many more years to come it's going to need regular servicing just like the owner manual recommends and for the best results you should always use OEM MerCruiser boat parts at every service or repair. OEM MerCruiser parts are manufactured by Mercury Marine to standards aftermarket parts can't match. With OEM parts you get durability and longevity, with aftermarket parts you can only guess how long they'll last.
Boats.net stocks thousands of genuine OEM 1991 MerCruiser inboard motor part and accessories. We discount every OEM inboard part we sell and back the price with our unbeatable price match guarantee. Qualifying orders ship for free and all orders ship straight to your door for your convenience. Shop for Mercury inboard parts at Boats.net for big savings.
Locating MerCruiser Serial Number Tags
Transom plates: The serial number tag is located on the inner transom plate inside the boat; or, on the upper swivel pin.
Sterndrive Serial Number (separate from engine): The serial number tag is located on the upper drive shaft housing (starboard side or on the back of the housing).
MerCruiser Inboard/Outdrive Model Identification
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