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    Surface spark plugs NGK BU8H too cold?

    Hello Need some advice. I feel that the surface spark plug type NGK BU8H is too cold for my use of the outboard. When I check the spark plugs, they are generally oily. Previously I was running both a little premix and the automatic oil system since I suspected the oil system was not working...
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    Prop type for my boat type?

    Hi Need some advice. Have had some problems with a boat motor, a Mercury V6 135 hp from -88, I found that the linkage to the carburetors were loose and not syncronized so the motor was not running at full trottle. Found a service manual, made some adjustments, and the motor suddenly gave a lot...
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    Fuel filter mounted wrong way and dirty

    Hi 1988 Mercury 135 hp, V6 Black Max When I changed the fuel filter, I discovered that the previous owner had mounted the fuel filter the wrong way, it was quite dirty inside the small filter cage when I opened it. I have had some issues at the top end rev, the motor will not reach top WOT...
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    What happens with motor performance when ageing? Mercury V6 135 hp

    Hi I just wanted to post this question to make sure I don?t change "the wrong parts". A compression test showed approximatey 120 psi on all 6 cylinders with very small differences inbetween. Motor is equipped with a Laser 2 prop, 23P. Boat is an english speed boat, a fletcher 16ft with a deep...
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    Trying to get a Merc 135 hp V6 back in shape

    Hi Trying to get some help getting a 1988 Merc V6 135 hp back in shape to my son?s speed boat. This question is from Sweden. The first issue of this motor is the oil injection. It?s a lottery. The horn may sound or be silent when turning the key. If it sounds, it may be beep-beep-beep-beep or...
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