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  1. Scott06

    3.0 mercrusier oil leak

    Thats the fuel line coming off the fuel pump . You say it is an oil leak? That is a flare fitting for the pressure side of fuel pump. Would just try snugging it up. if it is oil not gas would think you have oil leaking out from where pump attaches to the block or the diaphragm in the pump as...
  2. Scott06

    4.3 mercruiser knocking

    Agreed ujoints or gimbal bearing rusting during winter layup are to possibilities
  3. Scott06

    4.3L versions

    I know one of the changes in block casting was the metric blocks with 090M casting vs 090 the M or metric block used M10 metric fasteners for side motor mounts, starter, and flywheel cover bolts, all else was sae threads…completely interchangeable with a few new fasteners… @Scott Danforth may...
  4. Scott06

    Boat not running at full power

    When at full throttle and only going ten mph were the engine rpms up and the speed not consistent with the rpms engine is moving? did you check the prop for weeds? If rpm was high could be a slipping prop hub or coupler. Would look for obvious things like spark plug wire coming off , if you have...
  5. Scott06

    A Unique problem I have never seen

    I can tell you how i did it on my car… i would put my used oil in what ever gallon containers i had around the garage oil, washer fluid, antifreeze.… just finished a cam swap on pontiac 389, had a AF jug of used oil on the floor right next to the jug of AF i was topping the radiator off with…...
  6. Scott06

    A Unique problem I have never seen

    Drain it out use solvent like gas or kerosene to cut the oil use hot water and palmolive to get oil residue out. would have never thought of dish soap until my vet recommended it for getting fuel oil off of animals fur…the quote was “use dish soap preferably palmolive”…
  7. Scott06

    "Premium" vs "high performance" lube

    The gen 2 specs hi perf lube as well.
  8. Scott06

    "Premium" vs "high performance" lube

    You are correct the premium lube (light brown in color) was the lube for gen one and older drives back in the day. I suspect but cant confirm that it is the same formula. When the gen 2 came out in 1991 i think they changed the labeling to simplify 75 hp and below for premium, 75 and up for high...
  9. Scott06

    Heat Exchanger on Volvo 5.0

    My merc with a 160 thermostat runs 170-175 if thats what you are running you are fine
  10. Scott06

    Heat Exchanger on Volvo 5.0

    dont think you can have it open when hot, so top off run it a. It then top off more. Is the circ puMp in good shape ?
  11. Scott06

    Heat Exchanger on Volvo 5.0

    Yes top the level off in the heat exchanger. I would think you would see flow unless there is sediment built up or circulation pump on block is bad. Based on what you say i would top off and observe. If you still get no flow check circ pump and disassemble heat exchanger. Also possible raw water...
  12. Scott06

    Mercruiser 3.0 litre stalls at idle with new carburetor

    simple to do just a simple sanity check before you get too far in that the mechanical condition of the engine is ok you tube or manual will have procedure to follow
  13. Scott06

    2011 4.3 not starting.

    nothing gets hooked up to it. Its just a vent with a spark arrestor to make the ignition system safe in a marine environment
  14. Scott06

    Heat Exchanger on Volvo 5.0

    The heat exchanger has two sides to it. One side is the freshwater side with antifreeze that circulates to and from the block, heads and manifolds (if it is a full system. the other side of it is the raw water side, raw water is pumped through the heat exchanger, taking the heat away from the...
  15. Scott06

    Mercruiser 3.0 No Spark issues

    Best bet is to drill holes in transom to see extent of rot.
  16. Scott06

    Mercruiser 3.0 No Spark issues

    Or ring or corroded down pipe . also i think if shutters get burnt and lodged in there you may wear a hole in the pipe.
  17. Scott06

    Tachometer Problem

    You can try cycling the cylinder switch back and forth between cylinders, sometimes this will clean some corrosion off the contacts and it will work . may also look for corrosion at wiring points on back and at negative side of coil… other than that bad tach.
  18. Scott06

    Prop Fitment

  19. Scott06

    4.3lx flywheel replacement

    Bilge pump if its hard to get at. Wouldnt bother with 3 year old gimbal and bellows if they were oem parts you will have lots of years left
  20. Scott06

    Torque Process for upper bearing assy Apha1 Gen 2

    Use whatever you like but typical beam style wrench is +/-7% , dial style is +/- 2% .of course huge difference in cost.
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