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  1. S

    2016 4.5L mercruiser i/o Very weak performance

    Thanks, will do.
  2. S

    two questions - temp sender and ignition coil

    Raw water. Thanks.
  3. S

    two questions - temp sender and ignition coil

    Thank you. Sorry, away from the boat. Need to take a pic of that serial number next time I'm up there so I always have it. I did find both those schematics earlier, I just don't know where they are in relation to the engine - underneath, L/R side, etc. Thanks for info that coil is on port...
  4. S

    2016 4.5L mercruiser i/o Very weak performance

    Follow up. Turns out my prop pitch is 23, which I'm sure is killing my hole shot and planing time especially on such a stern heavy boat. Top end speed isn't a concern; is switching to a 4 blade 17" pitch too drastic? I can't find a readily available 18" pitch, just 17 and 19. Based on what...
  5. S

    a different stereo/dual switch question

    Thanks for the help guys. Huge help
  6. S

    two questions - temp sender and ignition coil

    4.5L 250hp Alpha One mercruiser i/o. Trying to locate the temp sender and the ignition coil. They're not obvious on a quick glance in tight space, and I can't find a schematic to help. Hoping they're accessible. Thx.
  7. S

    Radio turning off at certain volume

    Had EXACT same issue with new hi power sony head unit. DSXM80. Crutchfield said I needed to bypass the connectors and run power straight from battery, fused of course. Issue resolved.
  8. S

    a different stereo/dual switch question

    Hmm. Not sure how to tell if it's a make before break. It's a 2016 boat. Is there a way to tell from the switch itself? Also, which is the accessories terminal?
  9. S

    a different stereo/dual switch question

    Following some instructions from Crutchfield, I'm looking for clarification to a question I can't find here, apologies if I missed it. I installed a hi-power Sony head unit for more juice w/o having to add an amp. It cut out at higher volumes, and Crutchfield said I need to run the power...
  10. S

    reversing with trim tabs

    Thanks, guys, that's good news. I should have also asked if you have to adjust or remove them before trailering?
  11. S

    reversing with trim tabs

    Hello all. I'm considering adding smart tabs, the "automatic" ones which you don't control from inside the boat and can't retract. If they're always down, how does it affect reversing?
  12. S

    2016 4.5L mercruiser i/o Very weak performance

    I will check those as well and I have wondered myself if changing the prop could make enough difference because the power lag seems so drastic. I will say that in my experience with cars, fuel filter and spark plug problems will generally result in stalls or misses, and this motor is doing...
  13. S

    2016 4.5L mercruiser i/o Very weak performance

    Thanks everyone. Will check the stickies as well as the prop
  14. S

    2016 4.5L mercruiser i/o Very weak performance

    Just bought 2016 Hurricane Deck boat SS201. This 250hp engine is weaker out of the hole and planing off than the previous 150hp 2stroke EFI Merc o/b I had on a 2001 model of same boat. Don't think the hull has changed much even since way back then. I've got a guy telling me that's what...
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    2001 Merc 150hp efi beeps ONLY after bouncing hard over a wake

    SN OT323377. Does not give 3 beeps every two minutes or any other such pattern to help me identify it. If it takes a really hard bounce, it simply beeps but won't beep again unless you hit another big wake. No problems on flat water. No reduction in power, just the beep(s). I cannot remember...
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    Ghost in machine 2000 Merc ob 150 efi

    Sorry for the novel, wanted to be thorough. 10 hrs on Rebuilt power head, engine recently started shutting down out of blue on the water. No Sputtering, beeps or other warning. Has done it after 1 min on water following 5 min warmup in dock; also did it yesterday when it ran fine for 25 min on...
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    2000 2stroke merc 150 efi shutting down

    Hello everyone. Couldn't find a post with my exact symptoms. Engine starts and idles fine, about 3 mins later on water at medium throttle it completely shut down for a 1 sec then kicked back on like nothing happened. A few mins later, shuts down again (like a kill switch) to complete stop...
  18. S

    help - intermittent rpm loss on Merc 150hp (2000)

    Problem just started this past summer. Cruising along fine, then rpms drop. Not drastically, but maybe a couple hundred rpms. Calm water/choppy water, warmed up/not warmed up, doesn't matter. Will happen every minute or so, and drops only for about 10 seconds or usually less. This has the...
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