FAQ: What Brand And Model Carburetor Is Used On A 1989 Mercruiser 260?

How do I know what model Mercruiser I have?

The model of Mercruiser engine can be determined by looking at the last letters of the “engine block code” that is stamped in all complete longblocks by General Motors at the time of assembly. If the serial number, and/or model decals are missing, the engine code will help to determine the engine model.

What’s the difference between a marine carburetor and a regular carburetor?

The difference is in the bowl vent tube style. The marine carb has a J shaped vent tube. In the case of a float system malfunction where fuel is forced through the carb and out the bowl vent by the fuel pump, the fuel is directed back into the carburetor.

How do I identify a Quadrajet carburetor?

All Rochester Quadrajet carburetors are identified by a seven- or eight-digit GM part number. On units made before mid-1968, the part number was stamped around the outside edge of a round metal tag attached to the fuel bowl.

How many hours will a 5.0 MerCruiser last?

Small plane engines must be rebuilt in the range of 1200-1600 hours depending on make and they are usually well maintained. If you do, you should get more than 4-5 years unless you’re boating in the saltiest of waters. I have a 5.0 with 775 hours still runs good. As said, you need to keep up with maintenance.

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How many horsepower is a 5.7 MerCruiser?

The Mercruiser 5.7 liter marine engine is offered in three different configurations. The standard 5.7 has a propshaft rating of 250 horsepower. The 5.7 EFI or electronic fuel-injected model produces 260 horsepower. The 350 Magnum MPI or Multi Port Fuel Injection engine is rated at 300 propshaft horsepower.

How can you tell the difference between Gen 1 and Gen 2 Alpha?

The Alpha Gen II upper and lower housings are fastened together with two through bolts on either side of the drive along with the front and rear bolts, while the Gen 1 drives use one stud visible on either side. Alpha Ones have two studs under the ventilation plate just above the prop.

What does a MerCruiser serial number look like?

Are Mercruiser Serial Numbers Specifically Formatted? Mercruiser sterndrive engine serial numbers are formatted as follows— 0W555555. The first character is the number 0, not the capital letter O. Serial numbers that do not follow this format, rather have seven numerical digits, were manufactured before 1980.

Can you use a regular carburetor on a boat?

Carburetors are carburetors, but only marine carburetors should be used on boats. It’s true that marine carburetors started life as regular automotive carburetors but then each took divergent paths. Marine carburetors have certain modifications that make them uniquely adaptable and legal for marine usage.

Will a car carburetor work on a boat?

With no raw fuel allowed to puddle on the manifold outside the carburetor, there is no chance of deadly fuel fumes to accumulate in the bilge and no chance of explosion or fire. For these reasons an automotive carburetor should NEVER be used in a marine application.

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Will a marine carb work on a car?

The Marine carb will work just fine. It has some safety related features, such as the bowl vents, and a provision for a “puke” tube from the fuel pump, but otherwise is basically the same as a “car” carburetor.

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