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    leakdown/compression results

    1999 twin bf130s.Had the recall done in 02 .This year before the sea trial had these test down and results are as follows
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    prop results help please

    I have a 25ft wa boat weighs about 3850 dry it has a 350 5.7 Gm motor with the cobra outdrive.I have a 3 blade ss 15x 17 prop on there now. The specs for the motor I believe are 4400-4600 wot. I currently can reach 5100 with a speed of 32.4 other numbers are 4150@ 26.3 4000@ 25.00...
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    timing a 350 5.7

    Just installed a 1989 long block reman . It's a Gm 350 5.7 Omc set up it has the petronix ignition set up. The motor has the flat tappet lifters. I set the timing at 10 btdc the total is 32 and I'm burning 93 octane gas . Do these numbers sound right ? The motor does run well . If I move the...
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    flat tappet. vs. roller. lifters

    My mechanic is putting in a new jasper reman 350 5.7 Gm motor in my boat . I noticed the old motor had the roller type lifters but the one he ordered and the one going back in has the flat tappet type .will they work fine and last and will I noticed any HP lost ? Read so many different write...
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    OMC Log Style Manifolds

    Just bought a new set and was wondering if there is some type of sealant you use in between with the gasket , the riser and manifold ?
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    Rear Cylinders moisture

    Recent rebuild 1989 omc 5.7 bored over .30 Block is a 95-2000 according to the die cast numbers.Did a break in period . The motor was running perfect for about ten hours total time over the course of 2 weeks . I did an oil change at about two hours in then put in 5w-30 it was recommended...
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    omc thermostat housing

    Re: omc thermostat housing The part number from Ebasic is GLM13431 and I matched it with a new housing GLM22600.( < note period I added here) I will try and attatch a pic of what Im talking about . The 160 Thermostat is the same size as the 143. It seems to fit perfectly in there its the...
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    omc thermostat housing

    Re: omc thermostat housing Im gonna try and get just the new thermostat and see if I can get that ring to fit in after i clean the inside up ,,I understand now the way it is suppose to go back together my second question was the way the jimmy rigged it with a thermostat in the intake I was...
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    omc thermostat housing

    1989 rebuilt gm motor 5.7 omc stuff on it,, my engine seemd to be running hot the guage would stay around 160 then when under power jump to 200-210 I back it down then it cool quickly so I removed the risers and manifolds split them apart and cleaned them out I then removed the thermostat...
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    Electric fuel pump wiring with safety pressure switch

    Re: Electric fuel pump wiring with safety pressure switch I added one b/c the engine came to me that way I guess I could of drilled it out but i went with the carter marine fuel pump and there switch It runs for me flawlessly... heres a few pics of what I did to T it off one wire to the...
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    OMC 143 thermostat

    does Iboats sell a 143 degree thermostat for omc? I have a 350 5.7 the thermo housing I think is a 1989 Im running in salt water most of the time I looked but coulndt find it thanks
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    engine coil neg post

    all set now thanks
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    petronix wiring/ alternator

    1989 rebuilt motor 350 5.7 GM 305 hp,,,I just put the new motor in and I am starting to connect all the wiring I have the petronix ignitor with flame thrower coil and Im wondering if I have to to disregard the red/purple wire from the back of the alternator to the pos side of the coil? is...
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    engine oil

    yes I did a search and cant find my answer could be my search techniques...anyway new motor rebuilt 350 5.7 gm motor in my boat omc sterndrive,,engine was bored over so the builder says it has 305 hp...I plan on starting it this weekend and would like to know what type of oil for the new...
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    oil pan baffles

    trying to buy a new oil pan mine is rusted out I notcied some say they come with a baffle some dont,,I boat mostly in the ocean 350 5.7 I know it helps with extreme angles and cornering in racing cars but didnt know if it is def required for a boat engine
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    gps antenna location

    anyone ever mount them on the side like this? the holes are already there I have about 6 or 7 boat not moving just sitting
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    Y pipe O Ring sealant(help asap)

    Putting back together it where it connects to the back of the gimbal assembly inside the bilge (350 5.7) and I dont want it to leak here what type of sealant should I use to hold that little thin rubber gasket in place .. black permantex? I was going to use 3m5200 but I dont know about the heat...
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    what kind of staple gun?

    Re: what kind of staple gun? I used an arrow yellow older style eletric stapler with the 21 dollars a box monel staples for my coaming bolsters and I used pressure treated wood and it work great.You do have to push the stapler into the vinyl so they didnt bend but once I got the hang of it it...
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    Removing 110 Gallon Fuel tank

    if possible would like to salvage how do you hook up to it to remove,,,I have a wrecker so lifting it wont be a problem ,, what are the options?? the tank is 110 gallons probably original 1989 and its been sitting surrounded by wet foam and i think some of the water is salt,,, I started to...
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    blower ventillation

    I have an inboard/outboard and yesterday I removed the louver vents to sand and repaint there about 3 inches by 16 and are attach to the side ,, the one that connects to the bilge blower hose,,but if memory serves me correct doesnt one of the vents go facing the bow and the one that has blower...
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