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  1. Scott06

    Mc-1

    opening the top is like removing the vent plug to drain it... it removed the vacuum created .
  2. Scott06

    Mercruiser 3.0 No Spark issues

    I have seen a lot of negative comments but I have run them in the past. Had a 17 ft with 3.0l that it improved getting on plane especially with a skiier. Eventually it broke of my cavitation plate it was attached to. My advice is try the boat with it on and off an make your own decision...
  3. Scott06

    Bellow replacement job

    2004 Merc 5.0 Alpha gen 2 (outdrive/Transom Serials OM491962/OM847410) Going to replace my bellows this weekend, all original rubber- exhaust bellows gone, driveshaft bellows is good shape except for chaffing on side that I understand are from too long hinge pins. Have all OEM parts including...
  4. Scott06

    Engine dies after 40 minutes

    Who knows you it is possible it changes color at the cannon plug, but if you disconnect at the coil it should be irrelevant for testing unless the tach is reducing the voltage on the 12 ignition on circuit
  5. Scott06

    2003 5.0 MPI problems

    I believe 43 psi or so would suspect possible pump or fuel pressure regulator issues
  6. Scott06

    Engine dies after 40 minutes

    Not sure the history of the boat but had a similar issue with my brothers center console last year. Ran fine in the fall when put to bed, wouldn’t start in spring. Was able to jump the engine (yam outboard) at the cannon plug would run and start. Ran a jumper from boat harness at motor up to...
  7. Scott06

    Water Streaming from Weep Hole After Impeller Change

    Yes this build up probably blocked the flow... make sure it stays clean otherwise it can crack the housing if it freezes in winter
  8. Scott06

    Can the base of engine work? Two to bolts under engine are rusted and can

    I think you just disconnect the wires at the shift interrupt. Since it worked then it didn't suddenly, do you have a kill switch at the helm that may be tripped- do you have 12v at positive terminal of coil when cranking To rule out a back fire (when spark plug fires but intake valve is open)...
  9. Scott06

    Engine dies after 40 minutes

    Ok if you are confident it has gas would look for spark loss with a spark gap tester when this happens both off the coil ad at the plugs and definitely disconnect the tach wire at the coil. Maybe you can rig a test light off the 12v supply to the coil so you can see when it happens if you have...
  10. Scott06

    Engine dies after 40 minutes

    When this happens have you stopped and pulled a couple plugs to see what they look like? I assume when it happens and you stab the throttle fuel is being squirted out of the accelerator pump nozzles?
  11. Scott06

    Can the base of engine work? Two to bolts under engine are rusted and can

    That sounds more like a lean sneeze than a backfire. Are you sure its getting gas? check for gas and spark should fire? Also verify the shift interrupt switch is not active as that will ground the spark
  12. Scott06

    Mercruiser Alpha 1 vs SEI

    Unless you have mechanical coverage under your plan i dont think it will be covered, but doesn’t hurt to ask. a lot of folks use SEI with good results. They do have a good warranty. On an older model boat i would think thats the intelligent choice vs rebuilding or new OEM. alternatively you may...
  13. Scott06

    3.0 mercrusier oil leak

    you can try snugging it up see if it goes away. instead of replacing one of the carb shops i buy parts from sells these copper flare washers like these https://pontiactripower.com/products/copper-flare-gasket-for-3-8-fuel-lines?_pos=1&_sid=7d00365e8&_ss=r been amazed at how easy they seal up...
  14. 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...
  15. Scott06

    4.3 mercruiser knocking

    Agreed ujoints or gimbal bearing rusting during winter layup are to possibilities
  16. 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...
  17. 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...
  18. 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…...
  19. 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”…
  20. Scott06

    "Premium" vs "high performance" lube

    The gen 2 specs hi perf lube as well.
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