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  1. Scott06

    2002 Mercruiser 3.0 - No Oil? Engine Swap?

    #1 - block wouldnt crack like that from over heat only from not winterizing - also need to check if manifold is cracked as well. it is worth starting it on the hose and seeing if you get water into the oil . Sometimes will just crack externally and people slap JB weld on it and call it good...
  2. Scott06

    1990 mercruiser 4.3 no spark

    do the compression test as a sanity check other than that would think you are not on compression stroke.
  3. Scott06

    1990 mercruiser 4.3 no spark

    and you have checked the strength of spark with gap tester? basically confirm you are getting spark Was intake recently off and there is possible vacuum leak or just chasing down the no start condition ?
  4. Scott06

    Manifold Change

    I think they use a longer down turn after the elbows to match the riser which arent cheap as I looked into it a few years back. your bolts wont be long enough either so you are probably best to return and get the same size as you took out (assuming they were the correct height above waterline...
  5. Scott06

    Hotter than normal temps. I just replaced the impeller on the sterndrive, and pulled the circulator pump.

    Was the old impeller missing pieces? If so they can get caught in the system in places like power steering cooler. Otherwise wonder if hose came of transom housing or possible new impeller failed have seen some after,Arlen ones where metal core spins within impeller
  6. Scott06

    07 mercruiser 4.3 no start

    No get a volt meter and find out where you have 12 vac as outlined. Based on what you say in start you will have 12 v on positive terminal of the coil, hence the spark and running. In run you are losing it hence why it dies. It’s between the key switch and coil you are loosing 12 v . Start at...
  7. Scott06

    Choke valve position cold engine

    Typo dwell, ignition points dwell. Set dwell then timing. yes any tune up is done once it gets to operating temp. Get a factory service manual for your engine. Merc manuals have great detail on specs and procedures. If you have a modicum of mechanical knowledge a manual will help dramatically
  8. Scott06

    replace Mercruiser 2.5L 1989 with Mercruiser 3.0 1994

    that sounds right fully dressed (exhaust accessories etc) there is no real weight dif between a 2.5 and 3.0 they are essentially the same engine
  9. Scott06

    Hotter than normal temps. I just replaced the impeller on the sterndrive, and pulled the circulator pump.

    they usually last the life of the boat in fresh water. have never changed one even on 30 yr old boats. replace it if you want but that is not your issue here
  10. Scott06

    Hotter than normal temps. I just replaced the impeller on the sterndrive, and pulled the circulator pump.

    you probably were missing adequate water supply from the hose circ pump looks fine did you verify the gauge is accurate
  11. Scott06

    Choke valve position cold engine

    it may have been flooded or overly rich. Opening the choke and throttle will help clear a flooded or rich condition. when operating properly the choke will go fully closed but pops open a bit when the engine starts, then slowly opens more to full open when the engine warms up. Get it running...
  12. Scott06

    Oil Pressure Alarm

    yes clear plastic bottle about a pint in size
  13. Scott06

    No water coming out of the exhaust on muffs

    Exactly -only time I had an issue with the no choke was when I took the boat out in mid october (upstate NY) cold wet and rainy weekend in the 50's. a few min of warm up at fast idle was good to go.
  14. Scott06

    No water coming out of the exhaust on muffs

    either of them the element can be turned to force it open. When I had the element on my old boat just twisted the element such that it never came on. Ran it like that for many years, don't really need it much in warmer weather anyways.
  15. Scott06

    No water coming out of the exhaust on muffs

    No the opposite, if choke was closed the whole time it would explain why plugs are black and soot covered. When doing a cold start stabbing the throttle a couple times does two things. Sets the choke as when cold the choke will close , second the accelerator pump will push some fuel into the...
  16. Scott06

    No water coming out of the exhaust on muffs

    Depends on if it was loose enough that choke wouldn’t open. If choke stayed closed would expect it eventually would foul the plugs and not run Watch what the choke is doing when u get it running
  17. Scott06

    07 mercruiser 4.3 no start

    Use a VM to test Key switch could be the issue- so are you getting 12 v out of the key switch in run? If no probably the switch. if yes, then where are you loosing it from switch to coil? On a lot of boats the 12v come from key switch and daisy chains through the gauges, and probably a fuse...
  18. Scott06

    Only 3 Drain Locations?

    that may be depending on what cooling system you have I think you could have as many as 7 or as few as 1 (single point drain). issue is to make maintenance "easier" they hose over what were separate drain locations to a central or a fewer number of drain points. while in theory this is great...
  19. Scott06

    replace Mercruiser 2.5L 1989 with Mercruiser 3.0 1994

    I am assuming your old boat does not have power steering and the new engine does? the 8-10" long metal tube in the water intake hose is a powers teering cooler, this cools the PS fluid on the return line. Leave the cooler in the water inlet hose, remove the PS pump and 1/2" or so diameter hoses...
  20. Scott06

    Help me set up my new edelbrock 1409

    The over flow fuel line on the intake helps the fire start faster, so you don’t waste time just getting a whiff of smoke… the marine edlebrocks have a gold irrodite or similar finish vs the bare aluminum that the street carbs have. The bare aluminum corrodes in a car sitting in a garage … the...
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