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  1. Scott06

    MerCruiser 120 1968 2.5 not idling tight

    possible if there was grit in there that it was not pumping properly And starving the carb for fuel.
  2. Scott06

    No spark 4.3 Mercruiser

    Look at the wiring diagram black is always ground, or the negative side of a 12 v system. the fuel pump gets the positive 12 v from the purple yellow wire from two different ways off the starter during cranking when 12 v positive is supplied to the oil pressure (ignition switch is in run...
  3. Scott06

    MerCruiser 120 1968 2.5 not idling tight

    Not sure what you meant as auto correct took over. But yes if there is debris in the fuel system to have to clean it out. You may have a situation where debris was in your tank clogged the carb. You rebuilt the carb which is now plugged as the fuel system keeps feeding debris into it. On a boat...
  4. Scott06

    No spark 4.3 Mercruiser

    Sounds like your switch is bad if oil is coming out of it. Temporarily you can put a jumper wire in the connection to bypass it If need be.
  5. Scott06

    MerCruiser 120 1968 2.5 not idling tight

    In addition to Scott’s comments Check fir vacuum leaks not only at carb base but if I recall the intake on these older had a split casting top with a gasket on it . May be loose or need new gaskets if not done. the fact that it ran well after carb rebuild makes me think maybe a bolt loosened up...
  6. Scott06

    How to remove engine from 1987 Starcraft Islander 221V

    Is there a beam up there likely you can use what’s there already. If you want to get slick put a small I beam (4” -6”deep maybe 8 ft long) and a trolly with a chain Fall so you can slid the engine back and drop it. Would think youd be around 550 lbs dressed on that engine - block us aluminum .
  7. Scott06

    How to remove engine from 1987 Starcraft Islander 221V

    Call a towing company will probably cost you like $75 or 100 each way but worth it imho. When I did mine I looked at building an a frame was like $100 worth of lumber. ultimatley I got a favor from the rigger we use at work he brought a small crane saved so much screwing around and was so much...
  8. Scott06

    1994 SeaDoo SPi possible bad fuel problem

    Rig up a remote tank to run off a different fuel source see if it runs differently?
  9. Scott06

    How to remove engine from 1987 Starcraft Islander 221V

    I assume you are asking what do u need to do? remove outdrive remove positive battery cable at starter remove negative battery cable at flywheel cover disconnect wiring harness at 10 pin cannon plug pull fuel line from fuel pump or fuel filter, where most convenient to separate from where fuel...
  10. Scott06

    2003 SeaRay 200 Bowrider seized engine????!!!!

    Thanks for this info, so worst case a $1300 rebuilt ecm and that’s it ? I think really comes down to OPs desire for plug and play for the extra hp and convenience of mpi - 357 alpha carb is 275 hp, 300 hp for mpi in alpha configuration.
  11. Scott06

    2003 SeaRay 200 Bowrider seized engine????!!!!

    Every fall hanging upside down cursing with hot oil on my hands I wish I had spent $200 on one when I repowered... i cut off a gallon jug drop the filter into it and I can squeeze it between the manifold and the stinger pulling it out .
  12. Scott06

    2003 SeaRay 200 Bowrider seized engine????!!!!

    merc MPis have remote oil filters so would check the hoses and adapter at the block
  13. Scott06

    2003 SeaRay 200 Bowrider seized engine????!!!!

    The programming / fuel mapping is different between a 5.0 and 5.7 , reprogramming or reflashing as it’s called AD had given these guys out before https://obd2allinone.com/mercecms.asp they list going from a 5.0 to 5.7 reflash as $400 . I suspect there may be more details when AD swings buy but...
  14. Scott06

    gimbal housing broken lip opinions

    No I wouldn’t use it. It’s a flanged pvc ring that gets epoxied to the gimbal housing Around your broken lip. To be honest this kit looks like a bucket of $hit the more you stir it up the more it will stink. it also looks like your gimbal has some other corrosion on it in other areas so you are...
  15. Scott06

    gimbal housing broken lip opinions

    it saves the labor of removing the engine and transom/ gimbal housing
  16. Scott06

    2003 SeaRay 200 Bowrider seized engine????!!!!

    Rebuild yours or long block I would base off what yours looks like when you tear it down
  17. Scott06

    2003 SeaRay 200 Bowrider seized engine????!!!!

    I have the same boat , 2004, absolutely love it. I bought one the previous owner cracked the block. I swapped the 4.3 for a 5.0 carved setup I got from Michigan motors. Would recommend them the options depend on how involved you want to be and how dirty you get. If you can do the work get a...
  18. Scott06

    No spark 4.3 Mercruiser

    generic merc helm diagram https://www.perfprotech.com/blog/articles/mercruiser-engine-harness-schematic generic merc 4.3 carb engine diagram attached hopefully it is legible
  19. Scott06

    No spark 4.3 Mercruiser

    Red is power from engine to switch constant as you observe is correct Yellow red is to starter , purple is ignition on. You don’t need a ground on the switch you are only switching the positive side of 12 v up there. There will be a ground bar under the helm for the negative side of the garages...
  20. Scott06

    95 Mercruiser 3.0L 4Cyl to Diesel Swap?

    Yes , and as pointed out gear ratio is different for a diesel. Either find another 3.0 or likely the boat was offered with a 4.3 and step up in power. @Rick Stephens can tell you how to do it as he is the resident 3.0 to 4.3 jackalope ( or did u use a stronger term) expert. merc makes diesels...
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