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  1. nola mike

    1986 starcraft 170hp mercruiser.

    Trim down switch: connects grn/wht to red/purple Trim up switch: connects p/w to r/p. If switch is closed (motor down) p/w connects to blu/wht Trailer switch: connects r/p to b/w, bypassing limit switch Red/purple is hot. If the blu/wht wire is hot, motor goes up. Grn/wht hot lowers drive
  2. nola mike

    MC-1 transom + cork gasket, to seal or not to seal?

    Thinking the intrusion is from the outside in. There's a little rubber washer iirc
  3. nola mike

    Oil Filter, alt brands

    Last I looked at Bob is the oil guy, fram tg and better are good again Edit: if you *really* want a good oil or filter thread, head to bitog.com https://bobistheoilguy.com/forums/threads/fram-extra-guard-is-the-best-bang-for-your-buck.356356/page-2#post-6153156
  4. nola mike

    1986 starcraft 170hp mercruiser.

    Probably as a workaround for a bad trim limit sensor. In that case, the "up" trim button doesn't work but down does, and the trailer button works to raise the drive. If that button doesn't work, there was probably a bad switch and a bad sensor, and this was somebody's solution.
  5. nola mike

    MC-1 transom + cork gasket, to seal or not to seal?

    Disagree. Water can definitely enter through the bolt holes. Same as any transom penetration. See my above comment.
  6. nola mike

    MC-1 transom + cork gasket, to seal or not to seal?

    I filled with 4200 before installing the bolts. Looked like a vulnerable area. My bolts were severely corroded with some surrounding transom rot. I cleaned the transom area, filled with resin/PB, redrilled first. In retrospect just the 4200 probably would have been enough to fill the void, as...
  7. nola mike

    Leaving Tampa, Osprey, Fort Myers ? ?

    Mom's in Venice on the water, just found out she has no flood insurance 😥
  8. nola mike

    new vs. old thunderbolt ignition sensor

    True. I was thinking he meant does the TB system limit fuel normally. But yeah, op switch/fuel pump/choke would come to mind otherwise
  9. nola mike

    new vs. old thunderbolt ignition sensor

    Nothing in a TB system though?
  10. nola mike

    oil leak on 3.0

    Switches are a royal pita. I wouldn't bother unless you're in there for something else. I've had them working for maybe 3 of the 14 seasons I've had this boat.
  11. nola mike

    Mercruiser Oil Pressure Alarm switch troubleshooting

    If you're asking about #5, it's the oil pressure switch that runs the fuel pump
  12. nola mike

    Crankshaft sound?

    Nice, thanks for the update! Not sure how necessary that cover is to begin with
  13. nola mike

    Still having shift issues and need / like some input

    Yeah, that should show up as an increase in the cable throw though--the shoe has to rotate more to engage the gears. Would be tough to measure it with the drive on, at least accurately. There's specs in the manual including how to measure it.
  14. nola mike

    2003 25 hp merc 2 stroke impeller replacement

    I've got the manual, I know the timing specs...I just can't seem to check it.
  15. nola mike

    Still having shift issues and need / like some input

    So if unable to adjust properly it means you have slop in the system somewhere. Did you check all of the tolerances as in the video?
  16. nola mike

    2003 25 hp merc 2 stroke impeller replacement

    Well, timing at idle is 6', so it should be 6' until it starts to advance I'd think. I do want to verify WOT timing though, since I think the screw has been messed with before.
  17. nola mike

    Merc 4.3 v6 distributor cap and cilinder connections

    Looking at your original setup...you've got the cylinders numbered wrong, but connected correctly. So your #5 on the dizzy is actually the #1 cylinder, #4 is #6 cylinder, etc. This will run fine unless you try to time it using your labeled #1 plug wire, which is actually the #3 cylinder. You'd...
  18. nola mike

    2003 25 hp merc 2 stroke impeller replacement

    Yeah I have marks on the flywheel, no reason to think there's a sheared key. I was thinking of a points ignition where I could tell the position of the flywheel when the spark fires (when the points break). Obviously can't do that on cdi. Well, that's what I've been trying to do with the engine...
  19. nola mike

    2003 25 hp merc 2 stroke impeller replacement

    Very helpful. I was thinking static timing by rotating to tdc and seeing where the mark was (but this is better since you don't have to accurately find tdc) . How come it doesn't work right with the engine running?
  20. nola mike

    Diagram for coolant system?

    Are the tstat housings different for fwc/rwc engines? Short of having a HX or a circulator pump in your box o parts it might be tough to tell the difference. Plus it could be a half or full system... Don't know what merc offered then.
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