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  1. Scott06

    Water or oil in Cylinders

    that is fine for a pressure test. no issue Yes it is possible the exhaust is cracked. Normally folks do a test filling the manifold with acetone and see if it weeps into the exhaust side as it wicks through cracks more easily than water. Can also get sucked in if elbow is rotted out. If it...
  2. Scott06

    4.3 Ignition swap

    A quick ebay search shows TB 4 modules (are you sure its a 4 ? would think a 97 would be a 5) $200-400. https://www.ebay.com/sch/i.html?_nkw=mercruiser+thunder+bolt+4+igntion+module&_sacat=0&_from=R40&_trksid=p2332490.m570.l1313 Obviously depends on the exact module. But would keep it stock...
  3. Scott06

    4.3 Ignition swap

    Agreed Delco est is the way to go unless you can find a good used module on Ebay etc
  4. Scott06

    Water or oil in Cylinders

    normally if you have water entering the cylinder you will have no carbon in the cylinder or on the spark plug as it will steam clean it so to speak. If you think it is in #4 this could be from the exhaust manifold to elbow joint or a bad exhaust. after running it let it sit a bit take the...
  5. Scott06

    outdrive primer paint

    Agreed epoxy primer Like PPG DP series is great for bare aluminum. Used it in automotive retso applications and has held up for decades
  6. Scott06

    MerCruiser 140 (’68–’82) choke tube missing – alternative or electric choke conversion?

    usually those are US size compression fittings for like 1/4" copper tubing. if you can get them where you are should be easy to make. if not get an electric choke conversion like this one from Mikes -...
  7. Scott06

    Boat purchase

    slow down there's good people in this group. If you like it after water test and survey then ask to have it hauled or maybe make and offer conditional on having it hauled/inspected. While typically this is a buyers expense play dumb and see what happens. if the seller hasn't had a lot of...
  8. Scott06

    Moderator approval request

    another perfect use for lighten up Francis...
  9. Scott06

    Driveshaft housing oil seals and driver tool help

    i bought a seal and bearing cup driver set from Harbor Freight worked great had an assortment of seal and bearing cup drivers. look at parts diagram in this link there is a serial number split for one seal vs two- part #5. Would only assume that if the later siungel seal worked for all they...
  10. Scott06

    Holley carb gaskets - correct part #??

    yeah the ones in the pic of the kit match what I found on my phone from when I rebuilt the carb in 2023. so should be good. I can only assume Holley uses unpublished numbers or agrees to only sell those parts to VP? In the end the VP kit was $50-60 more than a aftermarket one so just paid it...
  11. Scott06

    Fuel water separator install

    they dont even hold a pint, so yes you are correct that it wont take much to pass chit
  12. Scott06

    Holley carb gaskets - correct part #??

    Thanks, for resharing the list, issue with this one -its not in that list, thats where I got stumped the first time, and paid too much for an OEM kit as even Mikes carb said one of his kits would "probably" fit. airhorn numbers are 3858330 75006-1 2631 Closest I can find on the list are 75009...
  13. Scott06

    Holley carb gaskets - correct part #??

    I need bowl and metering block gaskets for my friends holley 2 bbl on his 4.3 VP. is this the correct gasket set https://www.holley.com/products/fuel_systems/carburetors/carburetor_components/carburetor_gaskets/parts/108-200 It says 4150 gaskets doesntmetion 2300, but if you buy the gaskets...
  14. Scott06

    Fuel water separator install

    I did the same with the fuel out of my 65 pontiac. This was rust mostly but had a 60 year old fuel tank and the car has sat for years. Sucked it out , let it settle and used a paint filter to recover most of the gas. Since this was 93 octane for the higher compression engine I burned it back in...
  15. Scott06

    Fuel water separator install

    Dont expect the filter separator to get all of it out you will be sending chit to your carbs. Been through this on my friends boat bogging rebuilt the carb, that made it through a season and a half before there was an issue again. When I did the carb the first time and dumped the filter in a jar...
  16. Scott06

    1975 Mercruiser Tilt/trim issue

    I don't think it should go slow then pick up speed. You may have two issues going on. Kenny will know better than I but just reading this thread - if you like the boat and want to keep it, you may be better off just replacing with a newer pump, do the hoses and cylinders. You can probably find...
  17. Scott06

    Started out as a good day on the water. 4.3 mercruiser

    we have all been there. A few years back my then 13 or 14 year old was taking jetski out with her friend, one of first times she was out by herself. There were a lot of boats out this day, so I went out in the boat and from a distance just kept an eye out. Went over a hard wave and engine cuts...
  18. Scott06

    Apparent low oil pressure after coming off plane

    on my 5.0 and 4.3s the sender and oil pressure switch(2wires- for the electric fuel pump) are in a T above the oil filter housing on block, the alarm is a seperate switch with one wire on the block just next to dist.
  19. Scott06

    Apparent low oil pressure after coming off plane

    if it is the pre 2015 ish chevy based 6.2 the oil pressure switch will be by the distributor and as Chris stated single wire ground it and you should hear the alarm- not a bad idea to test
  20. Scott06

    Apparent low oil pressure after coming off plane

    25W-40 quicksilver or equivalent. Not to turn this into an oil thread - you just dont want 5w-30 or any of the thinner oils typical of modern automotive use. Given you are not getting an alarm- I would measure the OP with a mechanical gauge to vet the dash gauge. Would not be the first time a...
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