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    Safe cruising rpm and WOT rpm the same or different

    Are safe cruising rpm and WOT rpm the same or different? I have a 1999 Mercury 2 stroke outboard on a 18 ft Bass Tracker Pro Team 185 boat. What is a safe?efficient cruising RPM and what should the WOT rpm be? How long can you run an outboard or a sterndrive motor at WOT safely? Thank you
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    Mercruiser 5.7L Carb upgaded with 5.0L MPI

    Can the Mercruiser 5.0L MPI parts be put over on a Mercruiser 5.7L carb engine of the same year and function better than using the stock carb? I have several 5.0L MPI with cracked blocks that I bought cheap at a dealer and have several 5.7L carb engines that I would like to make MPI. They are...
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    Mercruiser HP difference 5.0L MPI vs 5.7 L Carb

    Why does a 5.0L MPI engine have 260 hp vs a 5.7L carburated engine has only 250 hp, and the 5.0L carb has only 220 hp and all three are rated hp at the prop? I thought there was no replacement for displacement. Does the 5.0L engine still use less fuel than the 5.7L engine? Is MPI superior in hp...
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    Mercruiser 2003 5.0L cooling lines connections

    I have a Mercruiser 2003 5.0L engine with 1990 center riser style water manifolds and would like advice on which thermostat gooseneck would be better to use. The first gooseneck is the one that doesn't have lines that would go to the risers only to the bottom of the water manifolds and...
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    Mercruiser 2003 5.0L ECM 555 base timing procedure

    Can anyone inform me if my Mercruiser 2003 5.0L ECM 555 has a base timing procedure or not? I know some of the older models MEFI systems can be put into service mode using a scan tool or a jumper on the DLC connector and the base timing can then be adjusted. But I don't think the base timing is...
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    Mercruiser 350 and 305 burns hole in piston #6

    I have a problem with #6 cylinder on three different engines possibly four that have been installed in my boat. The first engine was a Mercruiser 350 V8 and #6 hyperutetec piston top broke off and then I installed a second 350 engine and #6 sparkplug center electrode melted out. The third...
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    350 Mag Alpha 1 HP ?

    I recently purchased a 1990 Stingray SVC 200 with a Mercruiser 350 Mag Alpha 1 and I can't find out the horsepower rating. The title says 230 hp but that seems a little low because it has a 4 barrel Rochester Q-Jet carb with thru hull exaust. It runs about 52-55 mph on the gps with a 23" pitch...
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    mercruiser shift problems

    When I shift my 350 Mag Alpha 1 from gear back to neutral it always stalls out. Then I wiggle the shifter and it always starts back up. It doesn't stall from neutral to forward or reverse gear. Could it be the neutral safety switch in the shifter or the shift switch on the engine by the shift...
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