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  1. Q

    Mercruiser 5.0 TKS vs 4.3 MPI

    Hi Scott. Totally realise and aware of your experience. Of which, I’d love to have even half of it some day. No doubt. But in those days..quite simply the mpi always had more power. 4.3 4 barrel, 190,205. Mpi 220. 5.0 carb 220/230...mpi 260. 5.7 carb 250/260...mpi 300. 7.4 carb 310...mpi...
  2. Q

    Mercruiser 5.0 TKS vs 4.3 MPI

    It defo does add power...the guy is asking about an mpi remember. Mpi give more power than the equivalent era carb. You may be thinking about the efi?
  3. Q

    Mercruiser 5.0 TKS vs 4.3 MPI

    Listen. Honestly. I’m a fan of both. No doubt. Just the 4.3 mpi is hands down the sensible option when both are compared. Jeez...no wonder we are facing a global melt down, if we keep guzzling fuel when we have the option of using a little less for the same result.
  4. Q

    Mercruiser 5.0 TKS vs 4.3 MPI

    The crap I was referring to, was the idea that a 5.0 carb and 4.3 mpi will use the same fuel as each other, like for like. I didn’t say the topic referred to the same hull. Only replied to the idea of if they were the same hull and engines were compared. so again...I’ll say that the advice...
  5. Q

    Mercruiser 5.0 TKS vs 4.3 MPI

    Oh man. Some really untrue info being thrown about here. Without doubt a 4.3 mpi in the same model of boat as one with a 5.0 carb...will be better on fuel. Let there be no doubt about it. Apart from all that. The mpi boat will be more desirable than the old carb 5.0, when time to sell her on...
  6. Q

    Winterizing Mercruiser 4.3 question

    As said above. This debate will go on forever. But what ever you decide. Do not use the idiot YouTube flushing from muffs method of winterising. These are the smart ass guys that you never hear from again...because they are too busy looking for a new engine block the year after. either drain...
  7. Q

    Mercruiser 5.0 TKS vs 4.3 MPI

    If you want turn key boating and no messing with carbs...get the 4.3 mpi. An outstanding engine and every bit as powerful pound for pound as the thirstier 5.0 carb. Can also use plug and play smart craft gear too. These are proven to push your average 18/19ft bowrider to 50 mph and sometimes...
  8. Q

    Mercury Optimax 150 2011 boat not getting up to full rpm

    All I can advise is sticking to mercury already incredible variety of props, on a equally superb engine like yours. Unless I’ve missed something over the years...there just isn’t better. Especially when propping a mercury engine.
  9. Q

    2005 VP 5.7GXi-FF with rough idle and popping under load

    Hi I thought it would be iridium NGK 5599/5999 plugs for that. It is for all the mpi same engines.
  10. Q

    New 03 Sea Ray 176 owner, how to use quick drain block and mainfold handle to winterize?

    If it’s the 3.0, it un latches from its bracket and you hold it down to bilge to drain. Or is it the valve type and a larger 4.3 or 5.0/5.7 ? as for the rest of your question. I’d only cause an argument if I commented on what’s right. Hahah
  11. Q

    Gen 1 350 mpi 99’ block compatibility

    Cheers AD !
  12. Q

    Gen 1 350 mpi 99’ block compatibility

    Hi guys. So a fella I know needs another block to solve an issue where his currently suffered from the casting on his block where starter mounts, has failed. It’s a vortec 99 early mpi 350. Does he need another vortec block or will earlier blocks take all his top end gear and all that ? Thanks.
  13. Q

    1990 Bayliner bass boat.

    Hi. That’s not cheap. And that’s coming from a U.K. guy that’s up until now, been amazed at how cheap boats are in the us compared to here.
  14. Q

    Draining engine block - Merc MX 6.2 MPI/Bravo 3

    Hi I have the same system. I use the quick drain valve to empty engine of water, then undo all quick connect fittings to make sure. But I will also say that each time, there isn’t a hint of any potential causes of blockage. This is almost certainly because I’ve always left the block full of...
  15. Q

    2005 VP 5.7GXi-FF with rough idle and popping under load

    Hi there. Small chance I’m wrong, but by what you’ve said about the plugs being AC delco, they are almost certainly platinum and not the now preferred iridium. Have this in mind for a few reasons. Some of which would be that I mistakenly put ac delco plugs in mine the first year I had an mpi/gxi...
  16. Q

    Mercruiser 3.0 MPI 2016

    Hi How did you test the fuel quality. Not to doubt your mechanic, or you, but assuming this isn’t a merc or marine mechanic with diagnostics in hand to help ? I’d run her off a remote tank to totally rule out the most common and odds on favourite source of such issues on such a new engine. The...
  17. Q

    Scarab 21 excel and Baja 252 info

    Hi all So being over in the U.K. such things as the above two boats and also the Chase 550 I currently own, are very rare things...and such boats only make it over here by means of someone specially importing them over. So details are vague here at best. So hoping someone can answer a few...
  18. Q

    Anything I’m missing for getting my pride and joy a run after storage ?

    Hi guys. So I’m getting the wee monster a run this weekend after being stored for over a year now. Thought it best before another storage term. She was well stored and oiled etc there. I will do the usual cranking over with the lanyard pulled before firing her, just to get oil around her first...
  19. Q

    Mercury 2.5 to 3.5 2/ conversion

    Hi anyone done this ? Looks like it’s just the throttle bitterly actuator that restricts how far it opens and lets the carb breath. Noticed the throttle lever doesn’t travel as far as the 3.5 too. all else between them is identical as far as I can tell.
  20. Q

    Yamaha 225 v6 2/ water exhaust leak

    Hi all. Hoping you can help a friend out. On the first run out for a while, it was obvious that there is cooling return water leaking out the top of the mid section below powerhead to mid area. Just below the lower casing. Nothing coming out idle relief twin ports on mid section and no...
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