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  1. Scott06

    Information - 3L Mercruiser

    Be great if they have repair and service receipts. I would look not only at engine but overall care. Is it kept covered and in garage? if these simple things arent done probably no maint was. the 3.0 is very reliable and durable if cared for. Ideally you would want to look at a compression test...
  2. Scott06

    Need advice

    Doesn’t make sense and if this is their support id walk away If i could.
  3. Scott06

    454 no spark

    Heres a troubleshooting guide for TB ignition. Hopefully its just the sensor inside dist https://forums.iboats.com/threads/how-mercruiser-thunderbolt-ignition-systems-work.676476/
  4. Scott06

    Need advice

    if you did indeed order this engine https://www.promarengine.com/engine-details.php?pn=CH262M-04 then they didn’t send you the engine ordered… as long as you paid the listed $3299… if they charged you $1100 for a cheaper wrong engine then it would be fair to ask fir the difference if they pd...
  5. Scott06

    454 no spark

    Do you know if you have points or thunderbolt ignition?
  6. Scott06

    Trim/tilt rams: delete?

    Before you try go through so e diagnostics here what is it doing. Dont just replace the pump check the circut out
  7. Scott06

    Mercury 3.0 EST no spark

    Try mikes carb parts had very good luck with their kits over the years if you look in that parts list it lists both 1.60 and 1.65 jets not sure if one is fir the 3.0l vs LX doubt it would make much of a diff in air fuel ratio
  8. Scott06

    1995 merc 3.0 lx exhaust discontinued?

    Probably woukd google the sierra barr and merc part numbers see if any come up. A good fresh water take off should be fine
  9. Scott06

    454 no spark

    Do you have 12 v on positive side of coil when key is in run? Are you getting spark off coil and loosing it in the distributor ? Check the man overboard switch - ,make sure it is securely in on position.
  10. Scott06

    Hydrofoil

    This is true been there done that
  11. Scott06

    Mercury 3.0 EST no spark

    here is the link to the carb breakdown which is a mercarb https://www.marineengine.com/parts/mercury_marine_parts/sn/0F076166/430B0003S/1604_120
  12. Scott06

    Merc 5.7, alpha 1 gen2, Rochester marine 4bbl flood gushing up out of bowl/float vent!?!

    Identify what the issue is first. IF you bought it kit off amazon or other cheap site parts quality is likely suspect
  13. Scott06

    Merc 5.7, alpha 1 gen2, Rochester marine 4bbl flood gushing up out of bowl/float vent!?!

    If flooding either needle and seat /float isnt working or fuel pressure is too high. 4-6 psi max
  14. Scott06

    New valve cover gaskets and still leaking V6 4.3

    Yes you probably can reuse the gaskets yes put RTV on the rubber grommet for the bolts - basically use RTV anywhere where it could leak. Hadn't thought of what dodge mentions you could have slow oil return to crank case and oil accumulates on top of heads at High rpm. To test remove the...
  15. Scott06

    New to me Livingston not performing at its best

    Ok this is a power cat then ? You may check the motor height. My brother has a 17 ft Twin Vee Power cat w/ 60 hp yammaha- original dealer set motor way too low cav plate was buried
  16. Scott06

    Air Fuel Ratio Carb Tuning

    Realize they are a holley thing. I was just wondering more air in bleed = leaner mix? Reason I'm asking - I had to do some work on the idle tubes on my GTO tripower (Rochester 2 jet) to enlarge the openings the gas gets sucked up. Not sure if these are emulsion tubes or not. Not quite as much...
  17. Scott06

    New valve cover gaskets and still leaking V6 4.3

    Yes check for flatness. Clean them off get new gaskets. Put RTV on both sides of the gaskets/around bolts and snug them down. Let the RTV set up overnight
  18. Scott06

    Air Fuel Ratio Carb Tuning

    I've never seen any O2 sensors with smaller thread bungs, maybe it exists somewhere. To my knowledge edelbrocks don't have tweakable air bleeds or emulsion bleeds (at least not without drilling) - what affect do they have on mixture?
  19. Scott06

    5.7L rebuild and upgrade to vortec heads

    The only thing u can do is a leak down test to see if it is rings valves or both . That coupled with oil analysis to see if bearing material is present can inform u if your short block is good enough to accept new heads or you need a new long block
  20. Scott06

    5.7L rebuild and upgrade to vortec heads

    115 is getting down there. 130-140 is decent to good. might be worth a leak down on the low cylinder if its valves and you upgrade the heads anyways problem solved Unless u have bearing issues.
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