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    Prop Selection Help - 454 in 21' Baja

    Hello All - Need some prop advice. Finished rebuilding a 454 in a 21' Baja Sunsport (shallow vee, open bow, late 80s design). Engine makes about 430hp compared to the original 365hp from a 454 mag. So here's the prop info: Always had a 25p Turbo prop on it, 14.5" diameter, would run a solid...
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    Ticking noise on 454 mag

    1989 Mercruiser 454 magnum (rectangular port heads) all stock, quadrajet carb, aluminum high-rise intake Pushes a 1989 baja sunsport 210 (21') with a 25p turbo prop Recently changed intake manifold gaskets due to small leak. Took it out to lake for first time and it ran flawlessly, intake leak...
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    Small Milkshake found while fixing Vacuum Leak - ideas to fix?

    1989 Mercruiser 454 magnum (rectangular port heads) all stock, quadrajet carb, aluminum high-rise intake Pushes a 1989 baja sunsport 210 (21') with a 25p turbo prop Engine was idling poorly and getting inconsistent WOT rpms (ranging from 4400-4800 depending on the day, should rev to...
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    Weird Gauge Issue - Temp, Oil Pressure, & Fuel Gauge Mysteriously Stopped Working

    Hello All After getting the boat out after winter storage, I have found that my Temp Gauge, Fuel Gauge, and Oil Pressure Gauge have all stopped working entirely. Here is some info: No needle movement from these 3 gauges, 2 are pinned to max, 1 pinned to nothing The voltmeter/gauge DOES work I...
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    454 Mag Performance Issues - Hesitation/Backfire/Stumble on Takeoff and WOT

    I am having performance issues with a mercruiser 454 magnum (1989 engine, 365 hp)....Rochester quadrajet carb, outdrive is Bravo I, has transom exhaust. Boat for this engine is a 1989 Baja Sunsport 210 (21', about 2800 lbs dry, shallow vee hull, open bow). Per previous owner, engine should rev...
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    Intake & Exhast Leaks - Next Steps?

    Recently purchased boat in poorly running condition (would start and briefly rev up, but would not idle). Engine is 454 magnum w/ Bravo drive, 1989 model yr. Transom exhaust. Have removed and thoroughly cleaned carb (and checked that it has all correct jets)...its a q-jet by the way...
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    Click when try to start engine, no crank

    Turn key and get nothing but a click from the engine compartment. I have done a lot of reading and reviewed this link by Don S - http://forums.iboats.com/showthread.php?t=167035 Unfortunately still the same thing though - Have tested to find that the slave solenoid is in working order. Have...
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    Carb Cleaning - Getting it Right

    Cleaning Carburetor... Currently soaking in lacquer thinner, just have a couple of questions... 1st: I could NOT remove one of the primary main jets (the brass is stripped out). I assume this shouldn't matter as it should still clean up just fine? 2nd: Is there any cleaning that needs to be...
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    Electric Fuel Pump - Sight Tube Needed?

    I recently purchased a boat with an engine that has NO SIGHT TUBE equipped. I know that for mechanical fuel pumps the sight tube is used to connect the fuel pump to the carb; if the diaphragm tears the fuel dumps into the carb rather than the bilge. My question is this - IS THE SIGHT TUBE...
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    High RPM spark knock, merc 350

    1987 merc 350 To give a quick recap.....engine had water in the oil, determined via leakdown and pressure test that cylinder #5 had a bad intake valve and #3 had a coolant passage leak. Found out there was a blown head gasket and one of the heads was cracked too. So got a set of...
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    2.5L GM OMC revving to 5100 rpms

    OK - here's the story... Starcraft Medalist 1601, 16.5 ft, 2.5L 4 cyl engine, 1987 Bought boat 5 yrs ago....had 15p prop on it, would only turn 4000-4200 rpms 2 yrs ago bought lower pitch prop to turn higher rpms..... put 13p prop on it, turned 4600 rpms 4600 is right on peak rpms by the...
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    Turning crank by hand, harmonic balancer

    I understand that you are supposed to turn the crank over by hand, with a large wrench, by turning the center nut on the harmonic balancer. I have attempted to turn this with a 1/2 breaker bar and the engine will not budge. First off - I need to turn the nut on the harmonic "righty tighty"...
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    Alpha One gear case cover: 250 ft-lbs??

    Manual says the torque spec on the Alpha One gear case cover is 250 ft-lbs. These are the (4) 12-point bolts on top of the lower unit?? It's like a 3/8" bolt.
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    MILKSHAKE - water in engine oil, where to start?

    Pulled the dipstick yesterday and got milky oil. Engine oil was changed at the beginning of season, boat has been ran 4 times since then without any problems. Engine has been running just fine, absolutely no problems and wouldnt have noticed anything without checking the dipstick. It was...
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    Prop Spin in Gear, Alpha I MERC

    New to Mercruiser with a new boat this year......has a 1987 Alpha One Gen I outdrive on it. the prop spins freely in neutral.... when in the forward gear, it will not spin in reverse, spins forward but has a clicking noise as it spins. when in reverse gear, it will not spin forward, spins in...
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    Lower Unit making noise on turns...help...

    This problem started at the end of last summer and seems to be getting a little worse. Took it out over the weekend.... Mercruiser Alpha I Gen I on a 1987 Baja Sunsport, 350 I/O. Shifts into gear fine, runs fine, turns fine...without the noise you wouldnt notice anything being wrong. Problem...
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