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  1. Scott06

    Need advice

    I think roller lifters was in late 1980s. Metric was maybe 2003-2007 or so? Dont get hung up on the metric. My boat original had a metric 4.3 090m casting… the metric threads were on the flywheel cover bolts, Side motor mounts and starter bolts. all other fasteners on front of block were SAE...
  2. Scott06

    Mercury 3.0 EST no spark

    Usually check balls go up and down stream of accelerator pump one may or may not be used in well of accelerator pump, on the discharge side of pump there is a ball in the passage feeding the accelerator pump shot to the venturi nozzles. There is a metal T staked into the passage to keep the ball...
  3. Scott06

    Mercury 3.0 EST no spark

    Lack of full advance would limit your rpm and power potential not backfire. you said it was running at 170-180 i think that should have a 140 f thermostat which engine should run 150 ish wondering if that is contributing to run on? Might richen up the idle mix screw maybe half a turn and see if...
  4. Scott06

    95 Mercruiser 4.3 water in oil

    Doghouse is engine cover cowling slang It could if enough was present My dad pulled my boat one fall due to low water levels , covered it in the yard but left plug in , wasn’t much water in bilge but evrything under the boat cover had a layer of condensate on it two weeks later when I...
  5. Scott06

    95 Mercruiser 4.3 water in oil

    When I janked the cracked block from PO on my boat the oil was so milky it wouldn’t drain … it was a PITA to scrub out of the hill as he blew it out the valve covers … very different from what’s seen here and there is rust in intake passages
  6. Scott06

    95 Mercruiser 4.3 water in oil

    Looks to me like water ran down the intake and filled the cylinders Oil side of engine looks clean normally when water is in the oil and it’s run you get a creamy milkshake on oil side not what you see here can only think water got in doghouse or if shrink wrapped you had condensation inside...
  7. Scott06

    Unusual oil consumption? VP GM V8 Vortec 5.7

    What do spark plugs look like wondering if I take gasket isn’t on correctly and sucking oil into intake port via lifter valley ?
  8. Scott06

    Power Steering Leaking Into Water?

    My neighbor had an issue with ps fluid loss on their VP 4.3 hose clamps on return line from ps cooler were loose emptied the ps reservoir into the bilge
  9. Scott06

    Unusual oil consumption? VP GM V8 Vortec 5.7

    When u say brand new was it a new gm base engine or remanufactured ? Was the engine to properly broken in by varying the rpms for First ten hours of use ? This is done to seat the rings Michigan motorz recommended I use rotella conventional oil for break in and not use synthetic until the...
  10. Scott06

    Intake resonator for 6.2 MPI

    I believe you have the older GM sbc based 6.2 vs the newer (2015?) mercruiser made 6.2 . So no the parts for the newer non gm 6.2 will nit fit
  11. Scott06

    Hydraulic Lifter Volvo Penta 4.3 Vortec

    You don’t need to pull the head to change the lifters would also look at rocker studs valve spring etc on to make sure nothing is out of place that could leave room that lifter can’t adjust out of ….
  12. 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...
  13. Scott06

    Need advice

    Doesn’t make sense and if this is their support id walk away If i could.
  14. 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/
  15. 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...
  16. Scott06

    454 no spark

    Do you know if you have points or thunderbolt ignition?
  17. 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
  18. 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
  19. 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
  20. 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.
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