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  1. Scott06

    Crud in carburetor, is it a problem?

    In addition to what Rick mentioned . Can you measure fuel pressure at the carb at or close to wot rpm? wonder if carb bowl is empty I wouldn’t run it too much or too hard if it is detonating you will beat up your pistons. when you rebuilt the carb did u replace the power valve and did the...
  2. Scott06

    No spark 4.3 Mercruiser

    Ok must have missed that in the thread , jumper it out it should run guage and switch are off different sources. there is a round sender often on a t with the switch has a single wire on it this is what sends the signal to the gauge
  3. Scott06

    No spark 4.3 Mercruiser

    if there is no power on the purple supplying the switch you won’t get anything downstream of it... you can test it two ways, not that it’s an expensive part- put a jumper wire across the two terminals in the wiring harness. use an ohm meter to see if there is continuity when the engine is...
  4. Scott06

    Alpha one Gen 2 u-joints

    I think you need to use more force to separate them like with a bearing splitter
  5. 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.
  6. 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...
  7. 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...
  8. 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.
  9. 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...
  10. 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 .
  11. 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...
  12. 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?
  13. 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...
  14. 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.
  15. 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 .
  16. Scott06

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

    merc MPis have remote oil filters so would check the hoses and adapter at the block
  17. 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...
  18. 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...
  19. Scott06

    gimbal housing broken lip opinions

    it saves the labor of removing the engine and transom/ gimbal housing
  20. 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
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