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    Top end power loss at WOT on Mercruiser 5.7 Alpha 1997 while under load... why?

    Hello, I am having slight (10%) power loss at WOT and hoping for some tips to restore it. I have a 1997 Maxum 23ft fiberglass powerboat with a Mercruiser 5.7L V8 Alpha (sterndrive) with Thunderbolt ignition (carb) with over 1000hours. I have had the boat for 4 seasons and the engine has always...
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    1999 5.7L abruptly stalls, will turn on again, happens at all RPM few times per trip

    Hello, we have a 1999 Maxum with Mercruiser 5.7 (with carb) and Alpha one Gen II that developed a new stalling issue over the past few weeks. I appears to be increasing in frequency as in now at 4+ stalls per trip. The issue occurs after running the boat for 15+ minutes at higher RPMs, then when...
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    10% decrease in top speed at WOT on Maxum after changing prop with same dimension

    This year I changed the propeller and hub on my 1997 Maxum 2300 Powerboat (Merc 5.7L Alpha 1 Gen 2) and now I have a 10% decrease in top speed at WOT. I understand that the different diameter and pitch of propellers can change top speed and acceleration, etc, but my problem is that I replaced my...
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    Engine Overheating + Cooling System Issues with Maxum 2300sc with Merc 7.4 Bravo 3

    My buddy bought a 23ft Maxum 2300sc fiberglass powerboat that is having problems with the cooling system. The engine and sterndrive are the Mercruiser 7.4 V8 MPI with Bravo 3 (twin prop) all from the year 2000. This model has the freshwater cooling system (heat exhanger on top othe engine) and...
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    Need a prop recommendation for 1991 Bayliner 2556 25ft Flybridge

    Hello all, I have a 25ft 1991 Bayliner 2556 Ciera Flybrige with small block v8 Mercruiser 5.7L engine (with 1150 hours) and Alpha One Gen II outdrive. The boat is heavy ~6000lbs, plus 500-700lbs of fuel and usually between 6-10 passengers (girls). The current prop is a 3 blade mercury aluminum...
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    Toilet Not Bringing in Rinse Water (Jabsco Twist n' Lock)

    Hey All, I have a 2 year old Jabsco Twist n Lock compact marine toilet. When I flush it by pumping the handle up and down it exhausts all my waste just fine, but when I flick the black switch to bring in outside water to rinse the bowl, the vaccum is lost when I pump, and no rinse water comes...
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    Engine Knock or Clanking in Mercruiser V8 5.7L Valve train ...What is this SOUND?!?

    I have a 1991 Bayliner Ciera with small block v8 Mercruiser 5.7L engine (with 1050 hours) and Alpha One Gen II outdrive with freshwater cooling (heat exchanger). During a rare wintertime boat outing I was making my return as ran the boat at normal operating temp @4300rpm for 20 minutes back...
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    Salt water in cylinders of 5.7L Mercruiser V8

    I have a 1991 Bayliner Ciera with small block v8 Mercruiser engine (with 950 hours) and Alpha One Gen II outdrive with freshwater cooling (heat exchanger). During a recent fishing trip in Puget Sound I ran the boat at normal operating temp @4300rpm for 20 minutes to the site, then shut off the...
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