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    1979 Merc 90 Specs needed

    I have had a really difficult time finding correct specs for this motor. It is a 1979 1/2 (per the sticker on the motor) Mercury 90 hp serial 52999XX. It has a chrome and blue stripe around the cowling. It has a distributor-less ignition. I am looking for WOT rpm range, compression test psi...
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    Am I done? Need specs for 1979 Mercury inline 6 90hp

    Hello, I own a 1983 Sea Sprite 889 Sandpiper. It is a typical 18' fiberglass bow rider. Its dry weight should be around 1200 lbs per the nada guides. We usually have about 18 gallons of gas, 2-3 people on board, 2 batteries, and about 120lbs of fishing/trolling gear and food/drink. The motor is...
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    1979 1/2 Mercury I6 90hp 4600 wot to 4000 loss of power

    Hello, This past weekend my 1979 1/2 (it actually says 1979 1/2 on a white sticker along with timing specs) Mercury I6 90hp serial 52999xx lost 600 rpm and 5 mph like someone flipped a switch. The motor is attached to a 1983 17 3/4' Seasprite 889 Sandpiper fiberglass runabout. Two people on...
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    79 90hp WMK-27 Carburetor float weight spec

    I have a 1979 90hp inline six Mercury outboard. It has WMK-27 carburetors. It started running very rich and dieing at idle this weekend and I believe the floats need replacing. I gently tapped on each bowl cover in an attempt to free a stuck float valve. That didn't work. I plan on tearing down...
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