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  1. J

    Mercruiser 3.0 in regal 1800 - Temp gauge problem

    The gauge on the boat is reading 190f I have changed the the sender unit, thermostat, exhaust manifold and recently done the head gasket and changed the temperature gauge itself and it still says the engine is overheating. When using a IR thermometer next to the sender unit is says the engine is...
  2. J

    Mercruiser Alpha 1 not going into gear

    Hi I am currently doing valave adjustments on a 3.0 mercruiser and tried to put the engine into forward so that i can turn the prop by hand and when I put the throttle lever down the gears dont engage all the way, when you turn the prop clockwise the gear clogs are catching on each other and...
  3. J

    3.0 mercruiser smoke from rocker breather

    Hi I have got a 3.0 mercruiser and have recently changed the head gasket and the boat runs great now but there is some smoke coming from the rocker cover breather is this normal or do i have a problem? Any help would be great thanks Jon
  4. J

    Head gasket help!! mercruiser 3.0

    Hi Can anyone give me any tips or help on removing the head gasket on mercruiser 3.0 as i think it has a small leak. The engine is over heating and i have changed the riser , exhaust elbow, manifold , thermostat check the raw water pump and engine water pump. I have also just looked at the...
  5. J

    Manifold and elbow corrosion pics attached

    Hi Can someone have a look at the pictures attached and let me know if it is worth trying to clean these up or is it replacement time? thanks Jon
  6. J

    thermostat problem

    Hi My 3.0 mercruiser is overheating , i have removed the thermostat and ran the boat and the engine temp is normal at 175f. I have installed a new thermostat and have run the engine and the temperature is high again at 200f? what can the problem be?? i have tested the thermostat in a saucepan...
  7. J

    3.0 mercruiser overheating - please help!

    I have a 2002 3.0 mercruiser that is showing an over heat on the gauge, it was running at 175F and recently is showing 190 -200 on the gauge . I have changed the thermostat, checked the impeller and changed the sender unit and it is still running hot. What is the next thing to try? exhaust...
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