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  1. Q

    Very Low Compessions on Mercruiser 5.0 MPI Engine. with Exhaust Manifold, Thermostat Housing Removed.

    I take a guess at there being some sort of sub surface event or similar, at some point. Which might be reason enough to guess further towards the valves being less than ideal at sealing. Somewhere between there and a head gasket, as suggested above, will be about right. Hopefully the Mpi...
  2. Q

    What's the best prop size? - 22 ft tahoe 228 Merc Alpha One Gen II 220 HP

    Good info there. I might just add (if you don’t mind)…that I’ve always been amazed at how well the ally k series white props perform. I’ve often known them to outperform some like for like pitch stainless props. Just such a good prop. Quite a fair bit of performance oriented design, cut and...
  3. Q

    Mecury 4hp 4 stroke 2009

    Easy as anything to remove and clean. God knows, you’ll soon be an expert at it, should you keep her for long. I ended up getting a little fed up with that 3.5 of mine. Any time I took it off the auxiliary (kicker you guys call it) bracket, back home and between use..then take back to the boat...
  4. Q

    Mecury 4hp 4 stroke 2009

    Hi...with a fair degree of certainty, I would suggest that it's the carb needing cleaned...or at least something related to it. I had a similar aged 3.5hp engine ages ago...it was a nightmare for needing the carb cleaned often. The gasket for the carb was also a weak point too. But more than...
  5. Q

    Brand New Boat Owner- Prop Question

    Be a brave man that suggests an exact prop type and pitch, for a boat unknown to him personally. Even at that, a few more details would be useful too. Even after that..assumptions are a dangerous thing. Props just have a habit of not playing by the rules in general. Tell me more about the boat...
  6. Q

    blackmax 200hp 1989 problems

    Think you have sound advice above there. I’d certainly be looking around the main fuse and its holder. I’d also never rule out the carbs either. Despite being cleaned not long ago. Doesn’t mean anything, if there is any doubt around fuel sitting dormant in there for a while. Learned enough to...
  7. Q

    Brand New Boat Owner- Prop Question

    High 5 props (in my opinion) have their use. But one use only. That would be for giving a best effort at pulling people out the water, from a typically either underpowered boat or a boat that’s not designed for it. Outwith this use exclusively, they fall way far of the mark in every other...
  8. Q

    Solas Amita vs OEM (Yamaha)?

    Yeah. Fresh water inland loch. No tide or current
  9. Q

    Solas Amita vs OEM (Yamaha)?

    Hi. Keep me informed how you get on with swapping back to the oem prop. Always interested in that kind of thing. To be fair. A solas prop on my two Yamaha skis seemed to make a fairly considerable difference to performance. But not sure I’ve ever heard locally of a solas being much use on a boat...
  10. Q

    Sacrificial Aluminum Prop

    Thanks Bruce
  11. Q

    Solas Amita vs OEM (Yamaha)?

    Hi Bruce. The solas prop I had, came on a 16ft boat with a 90 merc. Don’t quote me on it…but I think it might have been a solas titan or similar at least. 19” 3 blade. I put a black max ally prop on it to try out. Being fair..the solas ran better than the black max certainly..then I put a laser...
  12. Q

    Props for Yamaha F100 and 17 Boston Whaler

    I think you are doing fairly well as she is...but no doubt there will be a mph or two to be gained with a really good quality stainless...But that said...I am a huge fan of the standard K series white Yamaha prop..best there is in terms of a standard ally prop.. These Yamaha 100/115 engines in...
  13. Q

    Eng acts like safety kill switch is engaged.

    Hi..being fussy..with the lanyard pulled, the boat won't start at all..or sound even close to firing. are we saying that the engine will start for a second then cut out ? or not at all...instead she just cranks over and no sign of firing ? each of the two above situations would suggest very...
  14. Q

    Sacrificial Aluminum Prop

    Maybe a little late an hour over where I am...and a few glasses of red wine down..also a little out of touch with the VP props these days..but what is a D5 prop ? I know well, the old type B series and C series (ally and stainless) and even the newer type J and F series. Is the D series a more...
  15. Q

    Sacrificial Aluminum Prop

    it might be equivalent to having a manual (stick shift) car...and trying to drive everywhere in 5th gear...or trying to tow the QE2 about the place... Basically it usually doesn't end well..con rods, bearings and all sorts will become under strain outwith their design tolerance.
  16. Q

    1992 mariner 150hp

    Hi... I am not familiar with that particular boat type...but what I can tell you with certainty, is that you would only usually find a 25" pitch prop fitted to a 150 mariner/merc, if the engine itself was on the back of a fairly high performing boat. A boat that's certainly running at speeds...
  17. Q

    Solas Amita vs OEM (Yamaha)?

    No worries. Like I say…you’re absolutely entitled to your own opinion. I’ll always admire a fella that does and stands by it with real life experience to back it up. Fair play. All I’d voice, is that I’m very geeky (more than any normal man should be) about my props. Almost an obsession to be...
  18. Q

    2002 MerCruiser mx 6.2 mpi wont idle

    Second the idea of making sure that distributor is perfect.
  19. Q

    Solas Amita vs OEM (Yamaha)?

    Love to see this kind of thing. Excellent. All I’d say is that the prop sizes and diameters there are likely of an obscurity. But perhaps very relevant to the info the poster is after. With his also being a pontoon. Fair play. I’d still stand by the notion that in general terms and use. On...
  20. Q

    Solas Amita vs OEM (Yamaha)?

    Fair play. Everyone entitled to their own opinion for sure. I’d never knock that notion. Absolutely. That’s the very first example I’ve heard of, where a dealer is putting a solas prop on a mercruiser drive from new. Didn’t elbow that what even a thing. Very brave. Yeah. Definitely comparing...
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