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  1. Q

    Only 4400 rpms on V6 4.3 2005 19P 3blades

    Be very unlikely I’d think AD. Being a 4.3. More likely a 1.6-1.8, you’d imagine. I’d suggest it’s revving more than 4400 in reality
  2. Q

    2004 5.0 MPI Mercruiser

    Typical symptoms of the diz cap failing. So common. Check your filter first off though. Plugs which run best are the NGK 5599 iridium plugs. Minimum spec but nothing like as good, are ac delco 41-993 platinum. Check you have these in there for sure. All too common for the odd guy to presume...
  3. Q

    1987, 454 Help!

    Couple of things to add maybe. I’d wonder around the choke sticking on for sure. Once it has and ran rich…it sure doesn’t take much to foul the plugs badly enough to have the effect of running poorly even after the choke has been sorted or ruled out. Can only rule this out with new plugs after...
  4. Q

    Mercury 4cycle fuel filter

    Normally a white in line small one under the cowl…and most packages done right, would have a water separating filter inside the boat.
  5. Q

    volvo penta aq170a

    These mostly overheat because of cylinder head issues. Very common on them.
  6. Q

    Mercruiser 4.3 added 4qts Still below ADD mark

    Says 4-4.5. Then you’ll have an oil filter with likely half again in it and it’s pipe work. More of you have it remote.
  7. Q

    Mercruiser 4.3 added 4qts Still below ADD mark

    I’ve had 3 of these 4.3 gms. Each I’ve had takes 5 litres
  8. Q

    Pre Alpha Prop?

    Hi. I’d say your tachometer is way off. 33 mph would be about right for speed. But I’d say there is little to no chance it’s doing that at only 3200 rpm. Usually those rpms would be about minimum planing speed for a set up like that. Around 20ish mph. If for some crazy reason the tachometer and...
  9. Q

    2007 Mercruiser 5.0 MPI, Crank No Start, Scan/Code Reader

    Check that cap again. Especially if it’s been fitted properly and sitting where it should. Two thing can happen here. They can be mistakenly fitted in a way that they don’t quite mate properly. Or they can be sitting not quite home and the installer doesn’t realise and then continues to tighten...
  10. Q

    2000 Yamaha 9.9 2 stroke won't start

    Hi. At the risk of being cheeky, is the fuel line gpimg from the tank to the engine the right way around ? The bulb will only go one way in direction of fuel between the two. ive had and still have a number of small Yamaha 2 strokes similar. There is definitely a technique to starting them...
  11. Q

    3 Blade or 4 blade prop?

    For me…it depends what the 17” 3 blade you have now is and how it goes. The thought around a 4 blade being better on fuel than a 3 blade…is a tough one for me to swallow. Be a brave man that would argue against sheer physics and it’s laws telling us that less blades always means greater...
  12. Q

    Need Help From You Guys That Have Prop Efficiency Calculators

    Haha. As you’ll know…prop perfection is something you can spend years and thousands on…even then…always a black art. Personally I’ve found that it’s essential to get good base numbers and data from the likes of a known (or as known as things get) entity prop like a black max or laser 2…then go...
  13. Q

    4.3 dies after 5-10 sec running

    Hi. My thoughts are around asking if it’s an mpi 4.3 and around when the last time the diz cap was changed out. Also around the mention of it being rebuilt too. Has she ran as she should since the rebuild ?
  14. Q

    Instrument cluster poorly illuminated; tachometer doesn't work...

    Agree with this. I removed the usual 501 bulbs for a set of red 501 led bulbs. For better night vision.
  15. Q

    Need Help From You Guys That Have Prop Efficiency Calculators

    I’d like to think that the sacrificial hubs in stainless props these days, usually do a good job of not damaging a prop shaft. Not sure it’s even much of a worry these days. Long gone are the days of stainless props being hard splined onto prop shafts. if you’re in mind to reduce prop slip and...
  16. Q

    Need Help From You Guys That Have Prop Efficiency Calculators

    You go stainless and quality. Like a tempest plus 3 blade or an enertia 3 blade.
  17. Q

    Need Help From You Guys That Have Prop Efficiency Calculators

    I probably said it’s the only way to increase slip
  18. Q

    4.3GXI-G distributor

    Hi. Sounds like it might be in a gaurdian mode. Has she ever seen the performance you are expecting it to do ? Is the engine original to the boat ? Are you trimming up and all that ?
  19. Q

    Volvo Penta in Bayliner 1989 runs in start position but not in run position

    Looks like he has listed a much more modern gxi engines in the post. Defo been replaced, if that’s correct
  20. Q

    Aq271 poor starting on hot engine

    Defo look at the choke. Well known for them to stick some of the way on. Any engines like this I’ve had…all got the choke wound off and locked there.
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