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  1. Q

    Hydrolocked in the parkinglot

    Is it possible your lower blue plug on the block you mention as dry, is blocked with the usual crap ? Is it possible your muffs aren’t good for sealing enough to let the water pump work well ? Have you checked the oil since ? Any sign of water ingress ? Any visible leaks out the block...
  2. Q

    UNBURNT FUEL DIESEL

    Fair play AD. I get what you’re saying and your reasoning...but with these particular wee things, along with their larger siblings..it’s not really a thing for them to blow fuel mist out the back in the water. With a leaking injector on these things, the most you’d know is a cloudy diesel...
  3. Q

    UNBURNT FUEL DIESEL

    Not at all suggesting I am AD. Like to think myself quite humble on here and ask for help on things as much as I perhaps try to give out. But one thing I’m certainly confident about, is Diesel engines. It’s my trade. I presume you are referring to the extreme case of completely raw and unburnt...
  4. Q

    UNBURNT FUEL DIESEL

    Not at all suggesting I am AD. Like to think myself quite humble on here and ask for help on things as much as I perhaps try to give out. But one thing I’m certainly confident about, is Diesel engines. It’s my trade. I presume you are referring to the extreme case of completely raw and unburnt...
  5. Q

    UNBURNT FUEL DIESEL

    Hi. Just in addition...make sure you’ve changed that supercharger oil too. Only takes less than about half a litre and so easy to do. But I’m really keen to hear if you’re lifting the trim tabs and outdrive trim at wot. also like to hear if you definitely hear the supercharger engaging around...
  6. Q

    UNBURNT FUEL DIESEL

    All dodge. It would be black smoke if it is getting more fuel than it can burn, usually. Or not enough air.
  7. Q

    UNBURNT FUEL DIESEL

    Hi. I’m now quite familiar with this wee engine. And as it happens, with this very boat. Although it’s the s25. Same hull though. Firstly I’ll say that the performance on these particular boats is hugely affected by trim on outdrive and also trim tabs. Usually you’ll use the tabs down and...
  8. Q

    volvo penta 151b

    Hi. If it helps you any...these are based on the old 4 cylinder Volvo car engines, if it’s the engine I’m thinking on. With a cam belt on it ? Always been a problematic engine in a boat.
  9. Q

    Proper Engine Oil Level

    It’s off the internet to be honest. I looked at the Manual for my engine and it suggested over 5 quarts to be honest. But it’s Defo not. Then I remembered that there was revised info on it since.
  10. Q

    Prop boat to jet boat?

    What you have just said..literally puts their inefficiency into perspective. What you have described is literally the result of huge prop slip and throwing power away.
  11. Q

    Prop boat to jet boat?

    You’ll definitely damage the gear in 18” of water. The operators manual on any modern jet boat will certainly tell you not to do this. The fact that you carried a shovel kind of tells a story. I totally get that some guys want to do what you did. But for general use. That’s not really normal. As...
  12. Q

    Proper Engine Oil Level

    Here you go. Check your serial number
  13. Q

    Proper Engine Oil Level

    I’ll look now.
  14. Q

    Mercruiser 3.0 reliability and overall maintenance?

    I’ve got to sit on the fence a little here. Searay are very common over here over the years. The old sea rays from the 80’s and early 90’s were of a decent quality, as far as the boats we see come across here from there are concerned. But late 90’s and early 2000’s they definitely took a dip in...
  15. Q

    Proper Engine Oil Level

    There are two oil quantity specs for these engines. It’s in the manuals
  16. Q

    Proper Engine Oil Level

    5.0 merc mpi isn’t anything like 5.5 quarts AD. I know that much. It’s only a tiny bit over 4 litres at its most im sure. Think litres are same as quarts perhaps. Maybe I’m off on a tangent, but thought I’d add that in.
  17. Q

    Mercury 3.5 4 stroke help

    Gasket missing too. Jeez !
  18. Q

    Mercury 3.5 4 stroke help

    So I found an exploded view. Looks like it is a spacer for the main through bolts and should be on the intake side of carb. It wasn’t. Presumably one missing from other bolt. Someone has had a go at this before me I think.
  19. Q

    3 blade stainless vs four blade aluminum

    I’m a religious believer and even fascinated or obsessed with prop slip calculations. With my fast boat, I’ve had it down to 4%
  20. Q

    Mercury 3.5 4 stroke help

    Evening all. So...first go at anything intrusive with these small merc 4 stroke motors. just taken the carb off very carefully and this brass collet looking thing is apparently come off something. Not sure where really. Surely not out carb ? Maybe a spacer for long securing bolts ? Hoping you...
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