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  1. Scott06

    1999 bayliner vibration

    Make sure to check the transom for rot while you are in there, otherwise all the other work and elbow grease could be for nothing
  2. Scott06

    Compression test results 4.3L V6 2005 what do You think?

    this is good advice, especially if you have to remove the manifold to do he gaskets look for streaks of water or rust isnide it and exhaust ports
  3. Scott06

    Compression test results 4.3L V6 2005 what do You think?

    I'll play the other side of the fence. The difference between the stated compression of 150 psi and what you see is the accuracy of the guage ( i know you bought a good one...). There doesnt appear to be evidence of water in the combustion chambers and assume the engine runs well based on your...
  4. Scott06

    97 four winns motor replacement

    As outlined its is likely your 97 is a Vortec ( 8 vertical intake to head bolts) vs the 94 that is a non vertec (12 angled intake to head bolts), the non vortec would make about 35 less hp. It is possible you could swap the TBI over using the non vortec intake , but hard to tell if the fuel...
  5. Scott06

    1999 bayliner vibration

    Port side bolt for mount into transom plate or into stringer? If its the lag into the stringer that isnt a big deal but wouldnt surprise me if you have issues with the rear mounts either sagging or missing parts.
  6. Scott06

    Trailer or Deflate

    The easier you make it to use the more you will use it, which points to a trailer so you can leave it inflated with the engine attched. Otherwise I would put the enigine flat in the back of the bed wrapped in a moving blanket vs on a stand.
  7. Scott06

    1999 bayliner vibration

    In additon to what Rick mentioned check the gimbal bearing is fully seated and turn freely, If it is scoring the shaft it may have not been fully seated or damaged by not pressing on the outer race to seat it, or the alignment is horribly off
  8. Scott06

    Engine Alignment?

    I think that stringer design is a hold over from having an OMC stringer engine. Newer transom mount enignes like yo are putting in only have a block of wood or built up ply wood tp the left of the area whwer y are thinking of making a notch. I would remove the stringer aft of wher you want the...
  9. Scott06

    Grounding coil for compression test

    Yes take it off distributor and put it on a grounding point on block or intake. it allows a path to ground for the spark , just like in your spark plugs when they fire... Or as AD pointed out you can disconnect the two bullet connections to distributor sensor and no spark will be made.
  10. Scott06

    New 15x17 pitch prop on Merc 165 L6

    Proper pitch for the application is everything. You are better to be a tad underpropped vs overpropped. What is the reccomended WOT for that engine? What type of prop did you buy - Black max?
  11. Scott06

    Which gasket is better for impeller install, metal or fiber?

    Being in the middle of this repair myself I asked the merc tech line if sealant was needed with the newer style metal gaskets. Their answer was no for either the fiber or newer metal gasket-not sure if pic will copy over but its the kit with metal gasket... Thank you for your email regarding...
  12. Scott06

    Prop choice Valvo penta 5.7 sx

    Do you currently get 4800 rpm with 17” pitch 3 blade? Your current wot rpm and mph would be helpful
  13. Scott06

    4.3 V6 valve steam seals replacement

    overthinking it, yes … i hope u leave some time to enjoy using the boat. Obviously you enjoy working on it and want it kept in good condition but don’t fix what isn‘t broken. the valve cover gasket that is not available currently will fit the other one i dont know. Best to contact summit or...
  14. Scott06

    4.3 V6 valve steam seals replacement

    No oil use no smoke = no problem with seals. Compression test will not show valve seal leaks. If you had good compression but were using oil and blowing blue smoke.... that would point to seals. But if you have good compression and no oil use that points to nothing is wrong with your engine...
  15. Scott06

    4.3 V6 valve steam seals replacement

    Unless you are burning oil I would not bother to replace the valve stem seals. It seems like you only have a valve cover leak not a buring oil issue. How many hours are on the engine? While it is possible to do with the head on the engine, it is a pain to compress the the valve spring with...
  16. Scott06

    Rebuilt Mercruiser 140/3.0 doesn’t have enough power to plane

    I got a new base engine from Mich Motorz 6 years ago, it was $200 shipping to my work, maybe 150 more to a residence with out a loading dock. I spent about another $500-600 on gaskets, gimbal bearing water pump. You may want to look at your rear engine mounts in the flywheel cover and change...
  17. Scott06

    Old manifold question

    I think the earlier 150 hp/230 cid version of the straight six was offered with that or a 2 bbl rochester. May have been like '65 or '66 years
  18. Scott06

    Which gasket is better for impeller install, metal or fiber?

    Good to replace the thermostat and zero the milage one wear items if you just bought it and dont have a history on it. By the dash guage my similar boat - 5.0/Alpha gen two runs about 165-170 with a 160 degree thermostat. so Id say you are fine. FWIW stick with OEM impellers, I just changed...
  19. Scott06

    Which gasket is better for impeller install, metal or fiber?

    I got one of these with the metal lower gasket as well. dont have it handy as its at the lake, but i do recall it had an instruction sheet with it. Did it detail anything about sealer?
  20. Scott06

    Antifreeze circulation through engine

    Your plugs may be different if its older. Older ones used hex pipe plugs- there will be one on each side halfway down the block just above the oil pan rail. Not all exhaust manifold cooling fittings have plugs, you just remove the hoses to drain. The big U hose at the front of the block now has...
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