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  1. Scott06

    Marine oil VS Standard Synthetics

    Agree don‘t over think it. i dont think in that application (stock 4.3) you really take advantage of synthetics. Any of the mercury 25-50 or 25-50 marine oils are fine, 15-40 rotella works great. Also have used mobil one 15-40 and 15-50. you’re only putting what 75 hrs a year on it ? any decent...
  2. Scott06

    Alpha One Gen Two outdrive vibration

    roughness or binding. Kind of tough to explain something you need to get a feel for. I would also look for marks where the u-joints gimbal etc may have been rubbing on driveshaft/yokes - which is likely the knocking you hear. Also look for water intrusion in driveshaft bellows.
  3. Scott06

    Does mercruisier 2.5 have the function of overheat alarm?

    My 1990 vintage 3.0LX/Gen one had one. Never over heated but the switch failed and I had to snip the alarm buzzer wire when I was out on the water one day...
  4. Scott06

    Alpha One Gen Two outdrive vibration

    Would pull the drive inspect gimbal bearing and u joints, issue there is most likely. I assume new Drive shaft and u joints came with upper drive, but id there was water intrusion could be an issue.look at gear lube for metal pieces, shavings are normal, but chunks not so. If those are ok might...
  5. Scott06

    Need torque for prop nut

    I used them twice for prop repairs. Relatively quick and good workmanship.
  6. Scott06

    Mercruiser 3.7 (470) wont turn all the way

    you maybe able to take starter apart clean and lube it and get it working
  7. Scott06

    5.7l carburetor choices

    For the Edelbrock carb -Merc part number 805359T is the throttle bracket. I was able to take the studs off my two bbl bracket swap them to the new bracket. Bracket also will mount slave solenoid and 50 amp breaker if yours is on your throttle bracket, nice clean install here is a schematic has...
  8. Scott06

    GM EST Ignition on Big Block Crusader

    I understand what you are seeing … when you remove the timing shunt it will come out if base mode and start advancing the ignition timing, thats how it works to find best running conditions. I assume when you come out of base mode rpm picks up? For example If you Google Delco EST you will find...
  9. Scott06

    GM EST Ignition on Big Block Crusader

    You seem to be ignoring what i posted and you dont understand how base mode works. It is normal when you take it out of base mode it doesnt stay at the static setting when it is is out of base mode. Youve tried now three modules with same results right …
  10. Scott06

    GM EST Ignition on Big Block Crusader

    First get a new battery And make sure cables and connections are clean. I think your module is working properly. When you lock it in base mode you are locking out the electronic advance. When you come out of base mode the ignition should advance like you see, it wont stay at 12. if you can set...
  11. Scott06

    Santa brought me Smart Tabs.

    I wouldnt run both the fin and the tabs but i have had nice results on a previous boat with the fin. Nice improvement in holeshot for $35 On ‘91 Sea Ray 170/3.0. when you are 250 lbs and depending on a 3.0 to drag you up skiing they helped. Are there better options now sure, but were talking...
  12. Scott06

    Mercruiser 3.7 (470) wont turn all the way

    Seriously just asking this not looking for an argument, then why did you take your 3.7 out ?
  13. Scott06

    Mercruiser 3.7 (470) wont turn all the way

    The other pain point on these is cam to water pump seal ends up putting AF in oil.
  14. Scott06

    Alpha1 350 raw cooled boils and ticks rapidly after short time on muffs

    Mine is carbed and has the 160 from factory, wasn’t just efi
  15. Scott06

    1973 Sea Nymph COHO 16 Transom

    It may be tough to find people with first hand experience on a 50 year old tinny. My thought is its good you are replacing the wood, and no I don't see an issue with replacing the bolt as is. the force of the engine will be pushing against the transom. Only other option if it really bothers you...
  16. Scott06

    Alpha1 350 raw cooled boils and ticks rapidly after short time on muffs

    Agreed my 04 had as OEM a 160 stat for raw water cooled
  17. Scott06

    Volvo Penta EVC tachometer LCD

    Thus is an add for repair service https://www.ebay.com/itm/VOLVO-PENTA-EVC-EDC-UNIT-REPAIR-/223667805296?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0
  18. Scott06

    5.7 truck cam vs marine cam

    Sounds like you are all dialed in good deal on the prop to pulley tear out. I did a similar repower a few years back , bought a great condition boat with known cracked block. Enjoyed the project and saved a bunch of money. Put some pics when u get it done
  19. Scott06

    5.7 truck cam vs marine cam

    Good deal. I assume you know that you will need to swap out for marine head gaskets, brass freeze plugs, and use a Marine water pump? Also use the elctrical and fuel components that are marine rated . that should be a nice power upgrade
  20. Scott06

    Mercruiser 3.0 135hp 2015 - Ignition fuse location????

    Some times the power is daisy chained through the gauges in series. check for 12 v supply to key switch. May have missed a wire connection on suuply power when replacing gauge
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