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    1998 50HP SPL Poor performance at low engine speed

    J50TSLEC Remote, electric start, primer on the key, 2cyl. I couldn't get the engine to fire up this spring, I found the primer solenoid had gone bad. I replaced that and the fuel lines to and from the solenoid. Now I can get the engine to fire up without much hassle, but it will only idle about...
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    1990 50 Johnson keeps dying

    J30ELE55 I bought this engine from a friend last year and had no major issues all last season. It has always ran a little on the rough side at low RPMs. I looked in the shop manual on how to adjust the low speed mixture on the carbs and went out tonight to fire it up for the first time this...
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    1975 Mecury 500 wiring harness, help me find the right one.

    **it is a 1976** I was gifted a 1975, or maybe it is a 1976 (serial# 41419184) Mercury 500. The guy told me it runs fine, but the wiring harness is shot. I've determined that the internal and external harness is in fact toast. Here's the problem I am having. First depending on where I look...
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    30HP Johnson isn't charging the battery

    Model # J30ELES it is a 1990 model I had the battery die on me while operating at the end of last season and I am now trying to figure out the problem I checked for loose grounds and found one. Fixed that and it charges very slow, when I put my meter on the battery terminals the voltage...
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    1990 30HP Johnson, dies after idling for a lenght of time

    Model number is J30ELES When in no wake zones or when trying to dock then engine will act like its loading up and die. Sometimes even idling in neutral for more than a min will cause it to die. You can usually tell its coming as the engine will start to bog. Then it will start right back up...
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    1990 30HP Johnson, dies after idling for a lenght of time

    Model number is J30ELES When in no wake zones or when trying to dock then engine will act like its loading up and die. Sometimes even idling in neutral for more than a min will cause it to die. You can usually tell its coming as the engine will start to bog. Then it will start right back up...
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    30hp loads up and dies at low rpm / idle

    I think I know what the problem is here, but i have never messed with an outboard and have only owned my first outboard for about a month now. so the first thing i notice is when i get on my boat (its docked for the summer) i smell gas. It cold starts fine, and so far as far as i can tell it...
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    3.0 merc prop size

    boat is a 1989 cheetah 18ft bowrider 130hp 3.0 merc 1.98:1 drive ratio max rpm 4200-4600rpm with my 14" aluminum 19p i run 36mph at 4800rpm with a borrowed 14" aluminum 23p i ran 37mph at 3900rpm even with the 23p the boat still planed out pretty quick considering the large pitch, but the...
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    3.0 oil level keeps going up on dipstick

    1989 merc 3.0 130hp, alpha 1 gen 1 I bought the boat last year and noticed that when i went to change the oil it seemed to be about 2 quarts over full. first time out this year, checked the oil before i left the driveway and it was right at the full line ran it on the water for about an...
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    Idle relief ports

    i noticed today while teaching my gf how to drive a boat that while cruising about 10-15mph the exhaust was kinda loud. I stuck my head out and the prop was way under water, but there seemed to be all the exhaust coming out of the idle relief ports. what speed and rpm is it suppose to switch...
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    3.0 over reving with 19p

    I got a 1989 cheetah 1800ls, alpha 1, 130hp 3.0 from a friend last year. it was in need of a gimbal bearing among other things. any way last year when i took it out before doing any work it would hit 35mph at around 4500rpms with just me aboard. this spring i replaced the gimbal and rebuilt the...
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    U-joint c-clips

    my mercruiser manual says if you hear slight u-joint knocking to instal this kit which consists of 8 c-clips. the part number is 53-12067A1. I just put a gimbal bearing in and now i noticed that my u-joints will make a knocking noise if i am at full turn or trimmed up very high. When i had the...
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    Help me figure out how water is getting in my Gimbal Housing

    I bought this boat last year (89 cheetah, 3.0 merc, alpha 1) and when test driving it i noticed what sounded like a bad gimbal and / or u-joint. I separated the drive today and water came pouring out of the gimbal housing. The u-joint bellow appears to be fine, but i did fine some metal ring in...
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    Replacing Gimble and U-joint

    1989 3.0 merc with alpha 1 drive i'm sure that one of the two needs replacing as when trimmed all the way down, or up, and while turning i am getting a loud noise at the outdrive my question is how do i do it? I think i just pull the outdrive and the u-joint is right there? what about the...
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    Gauges not reading right

    I just bought an 89 Cheetah 18' fiberglass boat with a 3.0 merc When you start it the volt gauge reads about 10ish, the tach says it is idling at 2500rpm and when I'm WOT it says 6000rpm. the fuel gauge is all over the place, even if sitting still it will bounce between 1/2 and 3/4. now all of...
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    Just got my First Boat, a few Questions

    I picked up a 1989 Cheetah 1800LS. It has the 3.0L Merc first thing is the speedo doesn't work, the pickup on the back of the boat is broke, i think its a pen type. Where can I get one of these? I don't think the tach works correctly, at WOT the tach says i'm turning 5,500rpms, its a 19 pitch...
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