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  1. Scott06

    Mercruiser 3.0 No Spark issues

    Take your plugs out an look for signs of detonation. Probably unless you just hammered it while pinging it will be fine. You can google reading spark plugs and find lots of pictures.
  2. Scott06

    Mercruiser 4.3…Milky oil coming from timing cover.

    Pressure test the cooling system, If water was getting into timing cover it would end up with milk in the sump as well....
  3. Scott06

    Mercruiser 350 Mag MPI Identification tag

    Agreed looks like someone used an alpha engine in a bravo application. When i was looking at repowering years back, was looking at a bravo engine for my alpha application, dealer said he could reflash the ecu to a alpha so i could have shift interrupt… that made me feel uneasy, but just points...
  4. Scott06

    Difference between Bravo 3 2.20R vs 2.20 vs 2.21

    Common issue on bravo 3 especially the earlier ones. Make sure your mercathode is working, you have the proper annodes. If slip kept stray current from other boats can be an issue as well. friend of mine added a second mercathode with two pucks on the transom after corrosion ate his lower housing
  5. Scott06

    Mercruiser 3.0 No Spark issues

    Check the timing with a timing light. Yes sound like detonation. could also be from being lean but start with verifying timing at idle in base mode is correct, and at full advance
  6. Scott06

    How does the Mercruiser Shift Switch work?

    Here's a good video of adjustment
  7. Scott06

    3.0 2bbl carb adjustment after rebuild

    The 3.0 is not a really smooth engine always vibrates some at idle if you are idling 750-775 is probably fine adjust down as needed when you are in gear on the water.
  8. Scott06

    Difference between Bravo 3 2.20R vs 2.20 vs 2.21

    So the real question is -if you swapped from a 2.20 to a 2.00 ratio drive would you be ok? No - you would need to drop down in prop pitch (assuming it was properly pitched) to stay at the same WOT rpm. If it was working ok I would keep your 2.20 upper and swap lowers.
  9. Scott06

    3.0 2bbl carb adjustment after rebuild

    Not sure what you mean by On spark plug wire? Would think the idle would stay steadier than 720-800 rpm but hard to tell from my keyboard
  10. Scott06

    3.0 mercruiser ran for 5 min good. Then Just died?

    Yes this would be indicative that needle and seat are hanging up. If you rebuilt the carb with a cheap kit may be worth getting a quality kit.
  11. Scott06

    Mercruiser Alpha 1 Leaking out of “weep holes”?

    Look in the stickies on the top of mercruiser page here for this link https://forums.iboats.com/threads/drive-pressure-vacuum-check.230980/ Stickies are pinned form threads with info on a lot of subjects ... There are also a bunch of you tube videos on how to do it.
  12. Scott06

    3.0 2bbl carb adjustment after rebuild

    Yes I would set the ignition timing, idle mixture ( richen and then lean to a stumble set in middle between those two extremes), then set idle speed screw to like 750 on muffs When you get it in the water and under load you can fine tune the idle. Note you may need to adjust the throttle...
  13. Scott06

    What size Prop

    Like mentioned the 19" pitch you have would fit the definition of an all-purpose prop. Were you happy with the way it performed? Do you know WOT RPM of that set up? That what you would use to tweak prop pitch of blade configuration. If you don't know that info would just replace what you have...
  14. Scott06

    Boathouse Length vs Boat Length

    I would be more worried about the boat being centered in the hoist than anything hanging out in the weather. You may need to move the hoist back in the boat house which may or may not be easy depending on how it is framed up
  15. Scott06

    Vibration at low speed

    I know you said you tried several props, but were any of them balanced? I had a similar issue had the prop balanced at a repair shop and issue went away. Was fine at high speed but I must have bent it at some point kissing bottom
  16. Scott06

    Wonder if I should go IO again or go OB?

    You mentioned kids, for me it personally comes down to how much you like the swim platform and sun pad. For me and how we use our bowrider those are key and I wouldn't want an OB on the back. For my brothers fishing boat having and empty floor a yamaha 4 stroke works great. The maintenance is...
  17. Scott06

    3.0 mercruiser ran for 5 min good. Then Just died?

    fuel pump is likely as Chris pointed out, just making the comment to verify there are no up stream blockages that are stooping fuel from getting to the pump.
  18. Scott06

    Ford 302...21 foot fiberglass with cuddy

    Ok same curve that to me looks like 10 intial plus 24+/-2 centrifugal advance. As long as you have the fuel it was rated for in terms of octane and carb is jetted properly should be fine at 34 total
  19. Scott06

    Ford 302...21 foot fiberglass with cuddy

    Just found this thread shows total to be about 28 degrees max https://forums.iboats.com/threads/spark-advance-1977-ford-marine-175-hp-302-engine.733308/ not sure i agree with last two posts in thread if graph is total or distributor advance where you would add ten initial to the 24 +/-...
  20. Scott06

    Ford 302...21 foot fiberglass with cuddy

    I would try and find out what the total timing advance was in the merc manuals maybe @achris knows what total advance for the ford 302 merc should be
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