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  1. Q

    Merc cruiser 5 0 backfire

    A friends mid to late 90’s 4.3 carb did just that when it was limiting. Literally a popping sounds. Not the usual electronic type the efi or mpi might sound like. Surprised me too. Known others since to do it too. Like a rapid popping sound for sure. Was about 4900/5000 on his questionable dash...
  2. Q

    Merc cruiser 5 0 backfire

    Yeah. The carbs that have a limiter do exactly this for sure eh. Like a popping. Be about 5000 rpm as far as I’ve seen.
  3. Q

    Merc cruiser 5 0 backfire

    Is it hitting the rpm limiter perhaps
  4. Q

    I'm just about ready to sink it.

    Hi. I’d start with the easy one to rule out first. Is it possible that you have a left hand prop on a right hand conventional unit ? Or do you have a conventional right hand prop on an engine that was once the port engine (and counter spun left hand) on a twin engine boat previously? Send us a...
  5. Q

    Correct prop

    Yeah. As said. You want to be seeing what she does full throttle and well trimmed. Tell us the rpms and speed she gets (gps) after doing that. What ratio is the bravo 1 ? Is it a 1.5 for example? What prop is on it now ? I assume you don’t mean that the speed and rpms you stated is when she js...
  6. Q

    Need advice for getting boat on plane

    Send us a wee picture looking at the stern and engine set up.
  7. Q

    Original sterndrive ratio for the Glastron/Carlson CV-27

    Think I and a couple others said exactly that previously, perhaps. I think (but not certain) that your mc-1 would/should have been a 1.5. The 1.47 I think (but not certain) came along later in Alpha form. Someone will know better than I. Don’t know too much about the mc-1…other than having one...
  8. Q

    Mercruiser greatly overpropped, need advice

    I’d say that sounds a great result for you, all things considered. Excellent. Was fairly confident this would be the cause of it all.
  9. Q

    Compression Test Readings

    I’m guessing the valves are stuck badly. Surely the only explanation for an absolute zero reading
  10. Q

    4.3 GXI - Fluid Recommendation

    Lots of variety in recommendations for oil spec, as always Scott eh. The usual and age old source of confusion still remains between VP and mercs stated oil spec…for what we all know is an identical shared engine. VP will often state 30w, 10w40 or 15w40 for these. Merc will say 25w40 to try and...
  11. Q

    Volvo 5.0 gxi Stalls at idle. Hard start.

    That noise is probably to be expected. That’s just the IAC doing it’s job of trying to control and counter what’s going on with the engine trying to stall. So what rpm is it actually idling at when it’s all as normal and on the verge of cutting out and what rpm does it idle at when the tps is...
  12. Q

    4.3 GXI - Fluid Recommendation

    Either way. This is a fantastic UK based source of parts for these things. Type in “gxi” in the search box when you find out what model it is. Then use this as a source of part numbers. Then search local suppliers to you or eBay. You won’t have an issue getting parts for it. It’s a very common...
  13. Q

    4.3 GXI - Fluid Recommendation

    What gxi is it ? There are a few variations. Gxi f gxi j gxi a etc etc. slight differences in the parts depending on that.
  14. Q

    4.3 TKS problem

    Hi. First place I’d be looking, would be pulling the plugs and checking that there is no water ingress from the manifolds or risers. Turn it over with plugs out after it’s been ran and in a condition exactly as it is when you find it’s hard to start and blowing fuses. See what happens and watch...
  15. Q

    Compression Test Readings

    Were the plugs wet ? Does this engine run at all ?
  16. Q

    Original sterndrive ratio for the Glastron/Carlson CV-27

    She’s lovely looking there. From the video. Sure sounds as if your fairly high on rpm for the speed you are doing. Can only assume that if you defo have a 23” prop (that’s suitable and well fitting to the larger gear case you have), then you must have an unusually low ratio outdrive. Sorry to...
  17. Q

    MAG 350 loses power after 20 minutes, need help

    I think you usually won’t get away with just draining the fuel tank. Usually needs totally opened up by removing the sender hatch, then sucked out bone dry. Then any crap in the bottom taken out if possible. Pick up pipe pulled out and clean of the entry to the pipe. As said…non return valve...
  18. Q

    Grew 237 Prop Question

    You think you’re trim is ok ? Like the drive position trim when coming on plane then to suit later when running flat out ? I’d say on that set up. About 3500 should have you planing and cruising
  19. Q

    Grew 237 Prop Question

    More blades equals more prop slip usually. So back to the rpm…was the 4000 rpm as much as you could get ?
  20. Q

    Volvo 5.0 gxi Stalls at idle. Hard start.

    Have you tried running off a remote fuel source to be sure it’s not a poor fuel quality issue ? Sorry if it’s been asked before. Sounds as if it’s struggling to fuel at low rpms.
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