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  1. Q

    Mercury Flo-Torq II Locking Tab

    Never had to replace these, even with frequent prop changes. The latter type is certainly a better design. It’s mainly the actual nut that does all the work and holding though. The nuts are nylock type locking nuts. Nylock nuts like these are officially designed to be single use items. If you’re...
  2. Q

    Trouble coming on plane

    What outdrive does she have ? Do you need a full tank for your usual use (if it’s relevant). Can you remember what rpm she can achieve when full throttle ?
  3. Q

    Trouble coming on plane

    If the set up is all original and if it’s a DP outdrive, the chances are that it’s propped as well as it can be really. The issue on boats like this is the balance of weight being seriously biased towards the rear end. Fill that fuel tank and the water tank, which are towards the rear. Throw in...
  4. Q

    Prop size 1989, Mark cruiser, 3.7,18.9

    Keep an eye on that water pump too !
  5. Q

    4.3 GXI-F Volvo Penta cranks but will not start

    Undoubtedly a battery and/or main cable(s) connecting issue. The tell tale sign of this on an mpi or gxi engine like this, is when you need to catch it on the throttle when letting go of the key (from cranking position). Start with a new battery. Because the battery will crank these...
  6. Q

    Sea ray sundeck 240 won’t rev passed 2000rpm

    Exception to that not revving (usually about 2500 rpm) rule, is earlier mpi engines from around 2003 for sure and maybe a year or so later. Just thought I’d add that in. Mine will rev out (if I’m silly enough) in neutral. 2003 v8 mpi.
  7. Q

    Sea ray sundeck 240 won’t rev passed 2000rpm

    Agree. Neutral safety switch is where I’d be looking, right after the main cables and obvious earthing points.
  8. Q

    Sea ray sundeck 240 won’t rev passed 2000rpm

    So. Just had another look at your video. The second one in particular there. Just as she alarms…you can see the rpm gauge suddenly drop. This to me indicates an electrical issue. Likely caused by a bad earth somewhere, or more commonly around the battery terminals and or main terminal posts on...
  9. Q

    Sea ray sundeck 240 won’t rev passed 2000rpm

    You are sounding like a fuel starvation issue there, I’d say. Are you sure you got all the fuel entirely out the tank ? That said, the alarm audible in the second video, might suggest another issue, perhaps sensor or ignition related.
  10. Q

    4.3 MPI Runs rough after putting in gear

    Hi. On an mpi like this, if you are running cold, the engine will run very rich and over fuel, with it presuming it needs to and still in a state of warm up or cold start condition. Add to this, the extremely high possibility that the distributor cap is doing its usual mpi cap party trick…you’ll...
  11. Q

    Trying find brand and type for a boat

    Very similar to an early model wellcraft 3600 Martinique perhaps. Does she have a 3rd oval window on the other side of the hull, up forward?
  12. Q

    Yamaha 225 v6 2 stroke 89’ help

    Hi guys…really needing some help from the collective and vastly more experienced than I, on an engine such as this…not something I’m too familiar with at all really, but having to learn fast, after a quick fault finding session this evening. Long story short…she’s a friends ‘89 Yamaha 225 v6...
  13. Q

    290 SS searay twin 383 strokers

    Hi. Don’t suppose these props are stainless and have a venting port system like pvs ?
  14. Q

    engine swap need to find right prop

    I think you’ll get a prop pitch for her, but urge you to find somewhere you are able to open the throttle up every now and then. Just to clear her out. Sustained low load running ok these engines isn’t good for them at all really. They need worked hard. Just the fundamental operation of any...
  15. Q

    engine swap need to find right prop

    It’s the GM/Isuzu Scott. I suppose what I might be getting at…is that running that particular engine at low rpms, not on boost or properly set up…won’t be too clever an idea. It will absolutely not be running as designed. Will be over fuelling and not combusting properly. Will almost certainly...
  16. Q

    engine swap need to find right prop

    It’s the GM/Isuzu Scott. Spot on.
  17. Q

    2018 Mercury 60hp EFI Fixed!

    Excellent find. Well done. Best of luck
  18. Q

    5.0l MPI Single Alarm at 2000 RPMs and higher

    Ok. Strange thing is though. At idle on a trailer, the actual water pressure shown on smartcraft is literally next to nothing, I know for sure. But it won’t alarm. You think the ecu was from an older version without the function perhaps ? Or is it just a faulty SW pressure sensor ? Is it...
  19. Q

    Need help with a 87 150 Merc has a couple issues

    Make sure your trim or switch box isn’t intermittently shorting out. Typical symptoms there.
  20. Q

    2018 Mercury 60hp EFI Fixed!

    Ok. Lots of things to check. Believe it or not… plugs would be my first go to. Since owning a 4 stroke merc just last few years::: constantly made aware that they can go through them quickly…despite easily ruling or dismissing out. Bad earths are also common on them. Enough to crank, but not...
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