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  1. Q

    Alpha drive for a V8 whats the ratio?

    100% spot on. I can’t think of one around here, apart from mine that has that ratio and a 5.0. Sometimes wonder if I’d rather a little less on the ratio. Just me idle wondering about the constant hunt for prop perfection though 😂. Would love to be able to run a 23” on mine. But the only one I...
  2. Q

    Correcting gear ratio with prop size

    Very true. But for the reasons of propping…I suppose I can understand some of the thinking above.
  3. Q

    Alpha drive for a V8 whats the ratio?

    I’d say you’d be right about the above. But I still think it unlikely he would have or be looking for a ratio like that. Could be wrong. The exception might be twin engines. Not sure I’ve heard of 5.0 having as high a ratio, unless it’s an mpi and a performance hull.
  4. Q

    Alpha drive for a V8 whats the ratio?

    I always thought that an older era alpha may have came in 1.5 ratio. Then later replaced with the 1.47 ratio, sometime in the mid 90’s or close. Anyway, it’s unlikely that you would currently have either, mated to your 5.0…unless it’s the rarely seen combination of it and a 5.0 mpi.
  5. Q

    Brand new cranking battery at 4.7 volts

    Hi. My first place to look, would be to things that are directly hard wired to the battery, or that have a constant feed uninterrupted. So things like the automatic bilge pump. Is the float jammed up and activating the pump ? Perhaps you are talking water in and genuinely triggering the pump ...
  6. Q

    Mercruiser 260 overheating please help

    Is she shaft drive by any chance ?
  7. Q

    2017 Mercury 150 need valve adjustment procedure

    Hi. I’m going to go out on a limb here…and suggest that it’s ridiculous unlikely that such a thing is the cause of your issue. It’s much more likely that it’s caused by more well known things on these. Like the HP fuel injection rail fuel filter insert needing cleaned or replaced. Spark plugs or...
  8. Q

    Sport jet 120hp cavitation

    Hi. Most common cause of this is usually the tolerance between the west ring and prop being out of acceptance. Either from a damaged prop or the west ring doing what its namesake suggests. It could also be the seal on the ride plate or even the intake grate or pump seal. Other things that may...
  9. Q

    Correcting gear ratio with prop size

    Haha. No doubting that !
  10. Q

    Correcting gear ratio with prop size

    Not technically true really. If there is a 5mph current and you are going with it. You’ll be running 5 mph more than you actually are, according to the gps. So for the purposes of propping a boat…not ideal perhaps. If we are being picky about things 😂. But I’d rather that, than go from a...
  11. Q

    Water in spark plugs Yamaha 1991 225TXRP V6

    Hi. I know a fella who overheated one of these, running her too high and doing about 70 at the time. She lost some compression and needed some work. After he rebuilt her…she was ram on test to run her in. She didn’t run well at all. Pulled the plugs and found signs of water like you have...
  12. Q

    Confusing cooling issue...

    Very standard symptoms of a worn impeller
  13. Q

    06 Mariner 9.9

    I think if it’s the same as the one I had from early 2000’s…they have intermittent flow from the tell tale. Comes and goes, because of the actions of the thermostat. But shouldn’t totally stop altogether or for long for sure.
  14. Q

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

    Hi. It only needs to lock when it’s in reverse.
  15. Q

    Volvo 5.0 gxi Stalls at idle. Hard start.

    Ok. And you’re certain that the diz cap is perfect ? Is the throttle body clean and no crap or gum having an effect on the mechanism? I’d take the plugs out for a look. Make sure there is no sign of water in about there.
  16. Q

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

    Amen. So important to have a nothing but excellent battery. I literally just got back in from getting a guys 4.3 mpi running. He was for pulling apart all sorts of things. Engine turned over fairly well to the untrained ear. Had both batteries feeding the engine. I found that one battery was...
  17. Q

    Engine aoecs

    Spark plugs : NGK BPR6EFS x8 Oil : oem states 25w40 quicksilver. You’ll need 5 litres (4 quart tub and a 1 quart tub if you buy the oem) and will likely take just over 4, but some vary with age. Please note there are many many alternatives and preferred oils. Most are around the 15w40 spec. Oil...
  18. Q

    1979 Merc 7.5hp oil mix

    Might not help you, being a foreigner thinking of units. 20ml for a litre, 100ml for 5 litre (bit over a gallon there) and 400ml for a 20 litre can (standard metal Jerry can size). For what it’s worth 😂.
  19. Q

    Correcting gear ratio with prop size

    Hi. That would be likely the right ratio for that set up. At a guess, you may get away with a little pitch on her. I’d guess the 19” would be a good all rounder for that boat perhaps, What kind of rpm and gps speed are you getting full throttle and trimmed up well ? Really fundamental to know...
  20. Q

    Volvo 5.0 gxi Stalls at idle. Hard start.

    Hi. How long after starting her, was the data taken ? I’d be keen to see what the cooling temperature shows when literally just started from cold. When cold, these things should over fuel and run rich as can be, until they warm up. Perhaps yours isn’t doing this ? Is the IAC filter sponge in...
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