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  1. Q

    Change oil on power trim pump (model 290)

    The oil should only be up to the level of the plug there. Messy carry on, but how it is.
  2. Q

    5.0 Gxi-ce 270-r misfires cyl 4&7 at full throttle

    Hi. Few things from me. Your engine will limit at about 5150 usually. Or even a touch less. Shouldn’t show miss fire errors though when it does. What will show them though, is the cap being bad. Even after a recent replacement. Sometimes especially so. Especially if care hasn’t been taken when...
  3. Q

    2007 volvo penta 5.0 fuel injectors are not firing at all.

    Your injectors won’t spray anything at all unless the ecu tells them to, via a voltage applied to each. If your battery is anything less than excellent, there is intermittent, weak or no power supplied to the heavily electrical dependent ignition, sensory and fuelling systems. All because the...
  4. Q

    Correct prop size

    Are you probably under pitched and hitting the limiter there, I’d say.
  5. Q

    Correcting gear ratio with prop size

    Maybe should go on your own thing and ask, but no, a 1.47 wouldn’t be close to the norm on your engine. The only 5.0 that rarely has that ratio is an mpi on a performance boat.
  6. Q

    Connect Lowrance to Yamaha engine

    Different network they use, I’d say. Isn’t nmea. It’s can bus and specific Merc connections.
  7. Q

    Volvo penta shift cable locking cable pin?

    Hi. Are you sure that it isn’t doing what they are known for..that is that it’s actually engaging astern, but the outdrive is lifting up, because the reverse locking catch is worn ?
  8. Q

    89 150 mariner lost top end replaced burnt rectifier ran ok for ten minutes and then lost top again , but rectifier looks ok

    Have you done a compression check ? Is she getting oil ? You pre mixing the oil, I presume ?
  9. Q

    1965 Mercury 35

    Lovely. Would love to see a picture of them both. Just being nosey. Haha.
  10. Q

    Raw water pump

    Hi. I was working on a boat recently with similar issues. It was a searay with twin 5.7’s on shafts. Kept overheating and fried an impeller after winter storage. Found that the sea water strainer lid wasn’t assembled properly. The wing nuts were cross threaded and giving the false impression...
  11. Q

    Air in the tilt/trim system?

    Hi. Are the wee valves correctly in place and the right way ? Forget what you call them. Check valves etc. poppet or collet valves maybe. Usually about 4 of them in the pump
  12. Q

    1965 Mercury 35

    Is the engine that age too ? Or is it the familiar 35hp from the 80’s ?
  13. Q

    Connect Lowrance to Yamaha engine

    Yeah. Agree. But it’s definitely a thing that merc and Yamaha require, to made to work on a generic plotter screen. Mercury one is ridiculously expensive. Yamaha usually much cheaper at about £100ish
  14. Q

    Mercury 150 2 cycle low oil alarm sounding

    Fair point. Well made.
  15. Q

    4hp 2T Mariner outboard - Trim not catching to Arm lock

    It should catch in that position for sure. But definitely not the earlier post video.
  16. Q

    Mercruiser 4.3 oil gauge mystery

    I think your limiter is broken too. If this is a 4.3 GM in later form. Shouldn’t get anywhere over 4900 or just a touch over at best. Nothing over 5000 certainly
  17. Q

    Connect Lowrance to Yamaha engine

    As far as I know, you will need the gateway to suit the brand of plotter you have. They aren’t too expensive really. I presume you have a modern enough engine that is compatible with such things ?
  18. Q

    2016 250 Verado

    Can you not use a universal swivel on the extension? I can get into my lower plug by doing that. All be it on a smaller engine of similar era.
  19. Q

    Efi flooding

    Hi. My mpi with corsa exhausts does this too. When she’s cold, she over fuels and fuel is evident smelled. Made more noticeable by the exhausts we have perhaps. If she’s been out a run hard and I let off the throttle, there can be a little unburnt fuel smell occasionally. Black suit Builds up...
  20. Q

    Help identifying which 454/ 7.4L engine this is?

    Hi. It’s either a replacement re power unit or it’s had a few diy bits added to her from the norm. The rocker covers and distributor don’t look standard to me. I also think it would be a rare thing to have a 1996 carb 7.4l engine supplied to a new boat in that year. My guess it’s that it’s been...
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