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  1. Scott06

    5.0 mercruiser 0M361530 carb

    Yeahyou want to ohm out the primary and secondary sides of coil see ohm specs in attachment. yours should be similar
  2. Scott06

    Replacing carb question

    Good advice. Theres more pics of Lous quadra jet on the web than miss october…
  3. Scott06

    Replacing carb question

    Your carb has been replaced previously. With two idle mix screws that is a rochester 2 jet the older brother of the Mercarb your boat came with. The mercarb was merccruisers in house replacement when GM stopped making carbs in the late 80’s early 90’s, not sure if they bought the toolingfrom gm...
  4. Scott06

    Crankshaft position sensor issue

    Your carbed engine doesn’t use the crank sensor but it comes on the engine from gm so that’s why it’s their and disconnected
  5. Scott06

    Moving 3rd toon back

    I cant' comment on the position of the center toon, but I think it would be a waste of time as you likely need more power to go faster. Also have you optimized motor height and prop selection yet?
  6. Scott06

    Can the base of engine work? Two to bolts under engine are rusted and can

    Exactly was going to say how are you starting it and is the choke operating properly. Marine carbs don't have a fast idle cam like cars so you have to do that with the throttle lever
  7. Scott06

    Problem with a Mercruiser 5.7 V8 LX

    https://forums.iboats.com/threads/how-mercruiser-thunderbolt-ignition-systems-work.676476/ try to troubleshoot the ignition system. i think it lists the voltages required in there.
  8. Scott06

    178xl chapparel wiring

    What engine do you have? On a mercruiser it will plug into engine harness. should be only two bullet connections back by flywheel cover
  9. Scott06

    Did research re slow trim tilt but…

    If you run it up and down several time is should bleed itself Assume fluid is clean ? Would look at connections to trim motor measure voltage while running Honestly being that year if it is working I wouldn’t dive to deep into it. Been a long time since I’ve seen one of those pumps…
  10. Scott06

    5.0 mercruiser 0M361530 carb

    This is the troubleshooting guide for TBV systems https://forums.iboats.com/threads/how-mercruiser-thunderbolt-ignition-systems-work.676476/ I would check the total ignition advance is getting around 28 or so degrees total at like 3000 rpm What do you spark plugs look like that can help...
  11. Scott06

    3.0 point gap

    Spent most of my life watching out for those …
  12. Scott06

    4.3 GXI-G Timing Cover/Oil Pan

    Try to get in touch with Achris- he went through a whole ordeal with similar leak was the pan and or cover had for lack of better terms a bump or mismatch that wouldn't allow it to seal properly. He may save you some headaches...
  13. Scott06

    Mercruiser 120 Non-Start Condition - Wiring?

    The grey tach wire will go to the negative side of the coil. I assume someone removed it because tach was shorting out the ignition. If you have no spark it is one of the first troubleshooting steps. As mentioned nothing wrong with a properly maintained points system, its as good as an...
  14. Scott06

    complete Alpha one Gen one retrofit into older boat.

    As AD outlined they make longer harnesses both in Merc and universal fit. I think looking at a place like Michigan Motorz and on ebay you would find what you need. You should put eyes on your existing donor harness, even though the boat is shorter the harness may be long enough for your new...
  15. Scott06

    Oil Filter, alt brands

    Yeah agreed heard a lot a bad stuff on fram but ran them on many of my cars for many years and miles… but also changed 3 k on conventional oil and 5-6 k on synthetic…
  16. Scott06

    1986 starcraft 170hp mercruiser.

    Trim up only lifts the drive about halfway up. This is the limit of trim you can use during running at speed. Trailer button is used to get all the way up engine shouldn’t be used more than just above idle rpm when in trailer . there is a limit switch on port side of outdrive that limits how far...
  17. Scott06

    Altenator and Starter Replacement

    battery AND ground connectins and cables at battery and starter/engine block.
  18. Scott06

    1986 starcraft 170hp mercruiser.

    What year is your boat. Older mc-1 had three buttons on the dash. Later ones (my ‘90 alpa one did) had them on shift lever. Suspect someone repowered or added a newer shift lever… may take a little looking around to see whats hooked up …or what someone did…
  19. Scott06

    Metal coming out from around gimbal bearing

    Tolerance ring is poking out around od of bearing starting about 7 oclock to 1 oclock…
  20. Scott06

    Metal coming out from around gimbal bearing

    yeah must have cocked it driving it in…id replace it
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