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  1. Scott06

    48 years...

    It sure that is needed either
  2. Scott06

    48 years...

    not needed you are pushing against plenty of metal. What are you using to weld with tig or mig? Was trying to guess from the photos.not mocking your work, I’m just learning how to tig aluminum .
  3. Scott06

    Merc 3.0 Overheating

    Have you verified the 175 plus is accurate with an ir thermometer? Do you have a ps cooler Is it clear of debris. There is a test to verify water flow up to engine I think you want to see 3 qts in about 15 seconds .
  4. Scott06

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    Jets do not affect idle and transition circuit . If you look down the bore and see when fuel starts dropping off the boosters you will be close to 2000 rpm, below that you are on the idle circuit
  5. Scott06

    Really Dumb Lower Shift Cable question

    save yourself a hassle and get an OEM one. If you pull the core out of the old one, shove a weed wacker wire back up it, tie it off in engine compartment, slide old sheath out, then use the weedwacker wire to route it properly around the wye pipe etc.
  6. Scott06

    Which hull brands to avoid

    Agree on the Bayliner, most of the really negative comments are old thinking. The newer ones are very close in fit and finish to the Sea Rays they are made next to in the same plant... Also agree on used stuff how it was cared for and maintained is more important than anything else.
  7. Scott06

    Pistons on Ford 302 / Mercruiser 188

    I don't think prior to the Q-jet coming out they had a 4 bbl big enough in an OEM format. The AFB that was on the early 4 bbl engines is 500 cfm. I don't think the 3x2 had better mixing than the 4's. I think in the end there is a reason that Pontiac went to a higher rise intake and the q jet...
  8. Scott06

    Pistons on Ford 302 / Mercruiser 188

    Never saw the movie. That is the original color Burgundy, just the cross ref number PPG gave me when I painted it back in 1992 is a touch more red, actually like it better. Rust wasn't too bad on this but accident damage was and the engine trans and diff had been blown up at various times. I...
  9. Scott06

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    Agreed wonder if there is a vacuum leak at carb base. would try shooting starting fluid at base of carb to see if rpm changes
  10. Scott06

    Pistons on Ford 302 / Mercruiser 188

    65 GTO Bought it years ago..1990. Had a 65 LeMans which I never should have sold, all I wanted after that was a GTO…
  11. Scott06

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    At idle nothing should be dripping out of the venturis. The only fuel flow is below the throttle plates in idle circuit holes. Either bad needle and seat /float, incorrectly set float level, or too much fuel pressure. Since you had same issue with both carbs might lean towards fuel pressure...
  12. Scott06

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    not sure what it is? I assume carbon removal from rings. Did that with mercruiser power tune and seafoam soak. Had less carbon coming out than when I have used it previously I think root cause was it was assembled by an 18 yr old idiot that I see in the Mirror
  13. Scott06

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    I thought his valve train video showed relatively even lift on all 8 . Of course I look at more threads than centerfolds in my younger days could be mixing them up…
  14. Scott06

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    Chinesium... to the OP if you shut the idle screws all the way down and it still runs gas may be overflowing the float bowl would look down the bores during idle. This assume you are at a normal idle and not into the transition slots like idling at 1000 rpm. No he did the leakdown which showed...
  15. Scott06

    For those thinking about an engine swap...

    At least you have some attachment to it, assume it has been in the family? Had a similar experience with my grandfathers boat ( 1966 ish Penn Yan) that he gave my brother and I after he paid $1800 to have the outdrive rebuilt ( this was in early 90's). He said you guys can have the boat but if...
  16. Scott06

    For those thinking about an engine swap...

    did a repower when I got my new boat. Old one had a 3.0 it was louder than my new one with a 5.0 previous owner cracked the 4.3 so I swapped in 5.0 because that is the biggest engine that model was offered. it’s unfortunate but your experince buying a used engine is typical. Unless you know...
  17. Scott06

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    Agreed to OP when you turn the idle screws in and out you should hear idle quality change and get to a point where it stumbles both lean and also when really rich. If very little changes when you turn the mix screws several turns in and out, your idle circuit is plugged or there is no fuel in...
  18. Scott06

    283 stalls when engine cover closed

    What do the plugs look like and is there gas in the carb after it stalls? When it dies reopen the hatch and pump throttle to see if accel pump squirts gas. What does it take to restart after it dies?
  19. Scott06

    Verify I have found all drain points

    There are five places on the block, I think you have most of them. they may have hoses hooked up in your case. Yes I would rip off the single point drain and put individual plugs in The drain points are - One on each oil pan rail One under each exhaust manifold The J hose on the circulating...
  20. Scott06

    2013 Mercruiser 3.0 MPI (engine rebuild)

    The con is making sure it fits and making sure you have all the pieces. As mentioned the engine harness connects to the boat harness via a 10 pin plug. You just need to have a 4.3 hareness. By far the easiest way to do this is get a complete tear out so you have the wye pipe exhaust manifolds...
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