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  1. Scott06

    replace Mercruiser 2.5L 1989 with Mercruiser 3.0 1994

    would agree where does the still connected end go... being a pair like that my guess would be trim limit or sender. Sender ends up in the engine harness to get up to the gauge
  2. Scott06

    Mercruiser 120 poor starting

    compare spark gap test before and after setting with dwell meter. Dwell is what determines the amount of time the coil builds up spark energy prior to firing. this is a great video explaining how points work and a fantastic example of what a good spark looks like. The money shot is at 5:07...
  3. Scott06

    Mercruiser 4.3L - Stumbles at 3000RPM

    To the above would also take a look at the ignition components cap rotor wires and what do the plugs look like? I would also be leaning towards a carb cleaning - very similar symptoms to my neighbors 4.3 some times fine sometimes stumble- rebuilt the carb and good to go
  4. Scott06

    Stupid me, no oil

    Yes that rear seal was not leaking, you would have had a chit load of oil back there.
  5. Scott06

    What's behind this plug? 2001 4.3L

    If yours has a balance shaft could be that. Small plugs are for oil galleries
  6. Scott06

    What's behind this plug? 2001 4.3L

    camshaft galley is behind it.
  7. Scott06

    Alpha one paper gasket slppage

    that's fine pretty typical that I see that. not ideal but never caused me an issue. You may have some material on the inside
  8. Scott06

    Mercruiser 120 poor starting

    If you are talking about an IAC or idle air control valve there isn’t one on this carbed engine
  9. Scott06

    Mercruiser 120 poor starting

    True if points haven’t been cleaned and dwell set start there
  10. Scott06

    Mercruiser 120 poor starting

    Not sure which style yours has but you can disconnect the wires to it and see if you have spark . It grounds the coil to momentarily kill the spark so the dog clutch in outdrive can unload and pop out of gear good to rule out the switch isn’t killing it
  11. Scott06

    Mercruiser 120 poor starting

    Have you ruled out the shift interrupt switch as possible spark killer?
  12. Scott06

    Help me set up my new edelbrock 1409

    I've never hooked a vacuum gauge to my boat, car for sure) I do it mostly by ear. On my 5.0 w a 1409 I find it likes it about 1.75 turns out
  13. Scott06

    Over heat alarm

    Bravoitis where it comes through the transom? Pretty common issue , pretty common solution
  14. Scott06

    Crank driven vs block mounted raw water pump pros/cons

    Would think how close the bulkhead/ Engine compartment is to the front of the crank would dictate this. If belt driven it would be behind the plane of balancer pulley
  15. Scott06

    Manifold Change

    Take the hose off the thermostat housing that brings water up from the outdrive. Should get 3-4 gpm. If not it’s from there back to outdrive. Also make sure the muffs are not impeding the water flow to the drive.
  16. Scott06

    2002 Mercruiser 3.0 - No Oil? Engine Swap?

    Then WTF did it go... I mean I haven't started drinking yet. take out the sender and hook up a mechanical gauge ($25 at autoparts store). When hot if it has 10 psi for every 1000 rpm of engine speed your bearing clearances are good. Very easy to run and engine on the ground
  17. Scott06

    2002 Mercruiser 3.0 - No Oil? Engine Swap?

    Was thinking the dipstick was broken or wrong one ... You put 5 qts in the engine (its a 4 qt motor) and there is nothing in the pan? You pulled the oil pan drain plug and there is no oil? Not sure where it would go unless it leaked out somewhere ?? Cant conceive a situation where the head wad...
  18. 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...
  19. 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.
  20. 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 ?
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