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    prop questions / rev limiter.

    okay I'm sure this has been visited before.<br /> But I'm wanting a better hole shot out of my 17' bow rider with a merc 3.0 and alpha 1 outdrive. I know I could drop prop pitches from 19 to a 17" but then I would turn high rpms, and since others will be using my boat I want to avoid that. So...
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    gear ratio?

    I was wondering on how I can figure out the gear ratio on a 1990 alpha 1 outdrive with a 1990 merc 3.0 left hand rotation? any easy way?
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    1990 merc 3.0 flapper vaulve

    My 1990 3.0 mercruiser rattles occasionaly, most of the time on when first started, it sounds like it is comming form the , back , lower , left hand side of the motor. from reading other post I believe it may be my exhuast flapper, is this a common problem, nad is there ever a time when you...
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    Busy weekend ahead, where will you be?

    Well I'm sure many of us will eb on the same lakes, maybe we could sit around and shoot the poop, to bads there not some identifying makrs to tell iboaters from others.. So I will be at lake DeGray in arkansas.. anyone else<br /><br /> Thomas<br /><br />white, red, gray 17' glastron.
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    Busy weekend ahead, where will you be?

    Well I'm sure many of us will eb on the same lakes, maybe we could sit around and shoot the poop, to bads there not some identifying makrs to tell iboaters from others.. So I will be at lake DeGray in arkansas.. anyone else<br /><br /> Thomas<br /><br />white, red, gray 17' glastron.
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    Don't tell me I ruined my alpha 1 gearcase>..

    Well today while runnign my motor in the yard on muffs, I gave it a little throttle, (out of gear of course) and started to her a really load klanking noise. I climb to the back of the boat and checked it out, found that it was commign from my upper gearcase on my 1990 era alpha 1 outdrive. I...
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    alpha one shifting

    when the day starts out, the boat idle at or around 7500 rpms, and will shift in to gear nicely, after runnign for a while and heating hup it begins to idle near 1000 rpms, and shifts much harder ""klunk"". the motor is a 1990 3.0 mercruiser. This is the same motor that I have been...
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    engine additives

    I have a 1990 mercruiser 3.0, and cuaght my self looking at all the diffrent engine treatment, and performance boosting additives. So now I want to put some in my motor.. The oil additives, like outlaw, and cd2 really got my attention<br /><br /> so what do you think, it there a need for...
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    last guess

    Is it typical for a 1990 mercruiser alpha 1 out drive to have the ablity to turn at almost 6k rpm, on a 17' fiberglass runabout the wiegh 1900 lbs typically loaded with another 700lbs the prop is 19 pitch ss 3 blade vengance , LH rotation brand new, no dings on nicks, hull is in level straight...
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    more power!!! ???

    Man I have a desire for more speed and power. Any one know of any performace parts for a 1990 3.0 merc with alpha one outdrive? I was thinking cam upgrade, maybe a 4bbl carb.. any ideas?<br />I would really like to improve, topend speed, but adding poneys would be a nice touch as well. The...
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    porposing questions

    My first experince with a vee-hull and I'm having some trouble controling it.. ON my old tri-hull/flat bottom bass boat the trim made a huge diffrence in the perfomace, I would start down then trim up, to gain speed, and move the "wetted" surface back. however on my runabout, with a stren...
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    tilt / trim.. whats the diffrence?

    I was just wondering what the diffrence is between tilt and trim. my morse controls have seperate switch for tilt which will only work when going down, and another switch for trim, which goes both up and down.. any Idea whats going on?
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    GUAGE READINGS

    What woul be the proper gauage reading on a merc 3.0 @ idle , my rpms read close to 1000, my oil pressure under 40 probaly at like 25 or 30. my water temp is always between 125 and 150, the hottest I have seen it was just a tad of 150.. <br /> do this all soud right, and at what pint should I...
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    is this normal?

    Looking at a new boat, and notice some high rpms, got out to look at the prop, I gave it a tug towards me, and away from the boat, the prop moved out a little, 1/8" or less, is this mormal or a concern.
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    Is this normall

    Is this normall I buying a boat, and while test driving it, I noticed that it could reach relly high rpms almost 6000.. the boat is a 17' glastron bow rider, I think it whieghs near 1700 lbs, we had a load of aroud 500lbs including gear.. the motor is a 3.0 mercruiser with an alpha one...
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    What to look for when buying used boat

    I think of buying a 1990 glastron seirra with a 3.0 mercruiser in it. as far as I can tell it is in excellent shap, only one bad spot in the upolstrey, and a very solid floor. BUt I really don't know what to look for. the guy is hard set on 5500, he is selling wit with top, cover, batter, skis...
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    opinions on 1990 mercruiser 3.0

    thinking of buying a new boat, it's a 1990 17' glastron sierra with a mercruiser 3.0, alpha one outdrive, and a 19p ss prop. The boat it self is in excellent condition, no floor root, upolstrey is imaculate, very few scrachtes onthe hull bottom. The motor I hear has between 50 to 75 hours, it...
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    could it be... Spark adavance

    My 1976 115 hp merc does not seem to have the woer it shuld, even when lightly loaded, compression is fine, fuel delivery is fine, just had carbs cleaned. What else could it be, I was thinking that proir to having my carbs rebuilt I messed with the spark advance, throttle stop and idle stop...
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    L/u identification

    If you suspect that the lower unit on you outboard is not the OEM part, how can you tell, I have reason to suspect that some one might had put a diffrent l/u on my boat prevois to my owenership.. any tips and suggestions to find out if they did so..
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    115 hp 1976 merc, needs reviving

    My 1976 115 hp merc on a 17' fiberglass bass boat whieghing in around 1000 lbs is really disappointing me, when I bought the boat I was at awe by the fact that I had a 115 hp 6 cyl motor on it. It runs really good with just me on it ( 130lbs) but once ouy put another person on it, it really...
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