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  1. Scott06

    3.0 Mercruiser

    Reving in neutral is meaningless it take no power to rev up with no load on it. when it dies have you checked spark strength with a cheap spark gap tester? If spark is good when it dies you are still dealing with a fuel supply issue .
  2. Scott06

    3.0 Mercruiser

    If you are not getting fuel likely the pick up (some have a screen inside of pickup tube) , or anti-siphon valve are not working or there is a blockage in the line. I think some guys have t'ed in a vacuum gauge on suction side to verify. As mentioned put a remote tank on temporarily to isolate...
  3. Scott06

    3.0 Mercruiser

    No that is the sending unit for tank level. when it stalls you still have spark ? when it stalls and you pump the throttle do you see gas squirted in by accelerator pump? if when it stalls dribble some gas down carb. Does it run a bit then?try to determine if you are missing gas or spark when...
  4. Scott06

    Mercruiser 5.0mpi w/yamaha outdrive

    Yes I think the transom hole is the same or similar. Your best bet is to find a used tear out with transom assembly and drive, otherwise piecing it together will kill you. what boat is it in ? If you can use an alpha gen two that cheaper than a bravo. you may be able to find a junk boat cracked...
  5. Scott06

    Bellows replacement

    Quicksilver is Mercury's brand that they sell outside of their dealer network. It is the same as Mercury products and is not the same as Sierra which is an aftermarket supplier
  6. Scott06

    Inaccurate Compression readings due to low battery?

    When the engine is warm and up to operating temp the pistons rings valves expand with temp. normally a compression test is done after an engine is up to temp. it is more representative of the engine condition
  7. Scott06

    Oem vs aftermarket cool fuel pumps

    If you can find an aftermarket Airtex (part of Carter) I believe they are who supplies the oem pumps.
  8. Scott06

    Lifespan of 4.3 V6?

    Are you in salt or fresh water. As Lou points out 5-7 years replacement in salt. In fresh they last the lifetime of the boat generally. water in oil is from overheat due to people too lazy to replace the impeller then using it hot, or freeze damage. With routine maintenance the rest of the boat...
  9. Scott06

    Bellows replacement

    Get the quicksilver/ mercury oem parts. My 2004 bellows lasted 18 years and still weren’t leaking … also if yiu don’t have it get a factory service manual (#14) wells worth the money and goes through replacement would also get the shift shaft seals and bushings ( swiveling shift shaft in...
  10. Scott06

    165hp I6 removal

    Yes whiskey also works, mostly for cold weather work.… i think once you get into it you will be pleasantly surprised how , how much easier than doing it in a car
  11. Scott06

    165hp I6 removal

    If you have done that you will have no problem. Being fords im sure you have replaced engines hundreds of times… seriously it’s much easier in a boat if you have the lifting equipment beam in a high bay, tree limb, gantry. You do need the get the engine up much higher than a typical engine...
  12. Scott06

    Please somebody indentify my boat

    Of subject but just wondering what paint system you used on this . Looks really nice
  13. Scott06

    Pinion gear timing to driven gears in B3 upper housing

    I think Dubs has steered you straight but do yourself a huge favor and get a factory Merc manual. The level of detail is incredible vs the Selco or Clymer stuff. Not sure what number manual you will need but I think I pd like $35-50 each on Ebay for used ones for my 5.0 and Alpha Gen 2 manuals...
  14. Scott06

    Where can this water be coming from?

    If it freezes due to improper winterization it can push it out. The plug can also rot out due to age, don't think a 165 has been made since about 1981 or 1982… as mentioned would look if it is coming off the head gasket or I had a cracked head on a merc 150 which is the little brother of the...
  15. Scott06

    Engine choice

    I think a lot of the water pump complaints on alphas is due to the use of junk aftermarket parts. I maintained a 1990 3.0/gen 1 in a 17 ft sea ray for 20 years. My folks bought it well cared for when it was 5 years old and i sold it when it was 25 years old After beating the **** out of it...
  16. Scott06

    Where can this water be coming from?

    X2 on core or freeze plug in back of block. Engine has to, if not come out,be lifted and pulled forward so flywheel can be removed to acess plugs. make sure you use a brass or stainless plug, do not use steel as they will corrode in marine applications. if a core plug is pressed out likely...
  17. Scott06

    Engine choice

    if yiu were going to keep the boat on a 24 ft I would get a bravo.if you are trying to piece it together to sell yes an alpha gen one or two. They stopped making the gen one in 1990 so that is likely why you find them cheaper. The gen 2 has a better water pump And is a more robust drive. not...
  18. Scott06

    Fuel injected parts no longer available

    Injectors can be cleaned or replaced normally things like the ecm are NLA . In that case yes the options are swap to carb or get used parts. Normally little in the automotive world can be used on boats do to electrical spark and fuel safety requirements. specifically what engine is in it ...
  19. Scott06

    Co-owning a boat?

    I had a friend who did that with two coworkers. They bought a year old rental pontoon from a marina, so it was new and had warranty. None of them were mechanically inclined so they split all marina, winterization, maintenance, gas fees three ways. One of them set up a calendar like you mention...
  20. Scott06

    Oil Analysis for high-hour 4.5L 250 HP

    No they are Merc produced engines not GM based. the 4.5 bears no resemblance other than number of cylinders to the 4.3.. It is confusing on the 6.2, Merc did use a GM bases 6.2 up until like 2015 ( stroked 5.7) the new Merc 6.2 other than displacement has no commonality with GM made engines. I...
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