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    reading plugs and tuuning motor

    I have 3.0 1990 mecruiser. Runs and starts good. I took plugs out and they are nice and black. Should I lean it up a little to get more power to the motor? Thank you
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    Is this speed about right?

    Hi, I have 18' 1990 Chaparral 1800SL with 3.0 Mercruiser Motor and carb and outdrive has full rebuild over last year, compression is perfect in all 4, starts and runs perfect. New plugs, cap, and all that tuneup stuff, timing and all... I had 17 prop and it only gives me 26-28mi/h(GPS) at...
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    Distributor cap and rotor question

    I have 1990 Chaparrel 1800 with 3.0 mercruiser. Engine was rebuild or maybe even swapped by previous owner, thats what my mechanic told me. Still has electronic distributor in it, but for some reason runs on the old distributor system. Bot runs fine, nice a strong. I wanted to do spring tuneup...
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    One way valve on the fuel line

    I have 1990 mercruiser 3.0 with mechanical fuel pump. After engine seats around for few hours it takes about 5-10 seconds of cranking to get fuel to the engine for start. If you started and shut it down right away, you can restart in just one click, like a dream. I took pump a part, and it looks...
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    Plz HELP identify my engine model

    hi all. I bought 1990 18' open bow Chaparral boat last year. Now I want to know what engine is in it, model (3.0L or LX) and year, because my mechanic told me that this is not original engine in here, or was rebuild. so I just want to know what I got if you can help me please. Mecruiser 3.0...
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    Crazzy prop

    I have 18' chaparral bow rider with 3.0 Mercruiser I just got. It has aluminum prop with crazzzy size: 15 1/2 x 41 is this possible??? I get 4000PRM at WOT doing 35mi/h GPS with 4 ppl in boat.
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    Chaparral 1800SL

    I got this used 1990 1800SL boat. I want to do some touchup on outside paint. How can I locate what paint was used, and where can I get some. Thanks all
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    noise from the engine bay

    I have 1990 Chaparall 1800SL Mercruiser 3.0L I had gimbal bearing replaced at the shop few weeks before this, they took outdrive out and did good job going over checking things. Now, few weeks later after few runs I started boat and hear noise like a belt noise screatchi metal noise, but this...
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    Temp gauge mystery ( got to read this one)

    Ok, so I got newer boat 1990 Chaparrel with I4 3.0L Mercruiser 130HP. Took it on the water and motor runs good, starts good, temp gauge not working, ok, I take sensor wire and touch the ground, gauge needle maxing out, ok so gauge working. I get new sensor, plug it in, take it out and gauge not...
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