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  1. Scott06

    Need advice from experienced people.

    Best bet is find a factory service manual for your engine. There is a link in the stickies of how to tune up your points ignition (assuming it is points)- but link is broken can PM a mod to see if you can get the correct link . Usually the timing is on the valve cover sticker or flame arrestor...
  2. Scott06

    Need advice from experienced people.

    It can set the timing to factory specs , if your total advance is low you wont make full power thus limiting top speed. Too much timing can lead to detonation that can destroy the engine
  3. Scott06

    1995 4.3 liter mercruiser

    The other two studs probably go on the starboard front engine mount. Two of the three fasteners on mine were studs to mount the fuel filter bracket
  4. Scott06

    Need advice from experienced people.

    Would think that boat would if properly proper do low to upper 30’s if it was running right . Did u do a compression test after what serial number we can tell I what the ignition timing is supposed to be
  5. Scott06

    GM 5.7L TBI & Thunderbolt IV compatibility

    You will need a low pressure marine fuel pump and wire it through a oil pressure switch so it wont run if ignition is on but engine isnt running . Search the threads you will see wiring examples for this safety feature. is your q jet an electric choke or divorced heat stove? If heat stove you...
  6. Scott06

    New Boater Prop Troubles!

    107 is essentially a dead cylinder. You don't put oil down the hatch you put it in spark plug hole it will help rings seal if they are shot. Check that valves are closing in cylinder 2
  7. Scott06

    GM 5.7L TBI & Thunderbolt IV compatibility

    Automotive tbi will not be marine rated for fuel and electrical safety stay with the carb assuming it is a marine w jet You need an 8 bolt vortec intake Michigan motorz sells a decent cast iron one. You may have an issue with pulley alignment but all else should carry over Flywheel may be...
  8. Scott06

    Can I use slightly longer push rods than stock on 454 Gen V?

    Motor year and boat year are two different things
  9. Scott06

    Cylinder pressure be on a mercury 175 sport jet?

    Dont buy it if u cant water test it
  10. Scott06

    Does this sound right? Mercruiser 4.3 Low Compression

    If it was running lean would likely think it has a tuilped or brunt valve maybe a burnt piston. Is the oil pressure ok and does it have any death rattles? What is the rest of the condition of the boat ? Structurally sound If it were mine I would look inside the spark plug hole with a borescope...
  11. Scott06

    Can I use slightly longer push rods than stock on 454 Gen V?

    @Scott Danforth or @alldodge will likely know what fits /doesn't and what big block have adjustable valve train
  12. Scott06

    Air Fuel Ratio Carb Tuning

    Offshore only has a bunch of info most of it targeted at more go fast boats with deeper investment level than we are running. Innovate motorsports has some info on their page. Wasn't a bad tool I think less than $200 (one sensor only) , like the ignition analyzer (measures kV of spark) I bought...
  13. Scott06

    Hydrofoil/Whale Tail Good or Bad

    two bolts on each side of cav plate. This is not the exact one but basically the same...
  14. Scott06

    Air Fuel Ratio Carb Tuning

    Yes it goes through a heat up mode. It is a standard bosch wideband 4 wire sensor. The plate to stab it in goes between manifold and elbow. Innovate only recommends using it for tuning not constant placement as even though it is 'dry' there there the wet exhaust will shorten sensor life. Kit...
  15. Scott06

    Boat wakes

    Well said only thing to add is think about how you want to use it and cockpit layout becomes important. With two daughters and their friends the sun pad and swim platform cant be big enough .... and for me the beer cooler big enough. Most boats today have a cooler under the seat mine is in the...
  16. Scott06

    Air Fuel Ratio Carb Tuning

    Ok so after a year of dialing the carbs on my GTO I'm going to move my AFR meter set up to my boat. Was hoping to get experience from folks regarding best AFR for marine applications. Boat is a '04 Sea Ray 200 sport - 21 ft Bowrider,3500 # dry weight, large lake use engine is a stock 5.0 ( I...
  17. Scott06

    4.3 V6 leaks wet oil sump

    Don't rule out spillage when topping the oil ....mine runs down the valve cover to back of engine and ends up around oil filter
  18. Scott06

    4.3 V6 leaks wet oil sump

    Read Chris thread he went through a bunch of issues with timing cover and oil pan …
  19. Scott06

    Fuel pressure

    Try using google a little https://documents.holley.com/199r7923-2rev2.pdf page 5 has fuel pressure. Also has other basic tuning parameters
  20. Scott06

    Boat wakes

    True inboard has prop below the hull takes up more water, I/O and OB can trim up
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