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  1. dsull

    5.0 Mercruiser Problems

    Also, just to clarify, I've not replaced the actual distributor, only the cap and rotor. I marked the rotor and replaced the new one in the same location. I also pulled one of the new plugs today and it was carbon covered which tells me it's running rich. I'm assuming adjusting the air/fuel...
  2. dsull

    5.0 Mercruiser Problems

    The engine has been running and, from my non professional ear, sounds nice and smooth. It has just been lacking power and not accelerating past ~2400 RPMs when taking off. It also has been trying to remain cranked even when the switch is turned off and will still turn over a few times before it...
  3. dsull

    5.0 Mercruiser Problems

    Oh. I knew that 🤦 I'd not heard the term overlap stroke before. Thank you for clarifying.
  4. dsull

    5.0 Mercruiser Problems

    I'm not overly versed in engine timing. I know I can pull the #1 spark plug and rotate the engine to the cylinder being TDC and pull the cap and see where the rotor is but I'm not sure what the overlap stroke vs firing stroke is.
  5. dsull

    5.0 Mercruiser Problems

    Well I loosened the distributor and rotated it clockwise until the "10" in the above picture was lined up with the notch on the block. The motor did not sound like it was running very well. I think the mixture is too rich but I won't have the tool to adjust it until tomorrow. It doesn't seem...
  6. dsull

    5.0 Mercruiser Problems

    I was on the correct plug wire based on your description and the corresponding numbered wire from the distributor. Sounds like the timing is bad far off. I would have thought the motor would sound like it wouldn't idle properly with it that far off but maybe not. Thus far in this process I...
  7. dsull

    5.0 Mercruiser Problems

    Well I tried adjusting the timing yesterday but was unsuccessful. When I grounded the purple/white wire and put my timing light on the #1 plug wire, I was nowhere near hitting the timing marks on the pulley. It's almost like the wire isn't grounding and putting it in base timing mode. Seems like...
  8. dsull

    5.0 Mercruiser Problems

    I have pulled the carb and checked it out. It was surprisingly clean. It looks like that TKS module just plugs in but I don't know if there are any other adverse affects if you simply unplug it.
  9. dsull

    5.0 Mercruiser Problems

    I've since learned I was supposed to check the engine compression with the throttle wide open. I'm not sure how that would make a difference without the engine running but that's just what I was told. 125-130 was with it in neutral. Seemed low but I'm not sure. I'll check timing tomorrow. Any...
  10. dsull

    5.0 Mercruiser Problems

    It DOES have the TKS module on it and I have read up on it a little. From what I read, it sounded like it kicked the idle speed up to around 950 for 6-10 minutes after cold start before lowering it back to 650 under normal operation. Sounds like it may not be shutting off. It did read like it...
  11. dsull

    5.0 Mercruiser Problems

    I just recently purchased an 09 Glastron with the 5.0L Mercruiser carbureted motor and an Alpha One lower unit. Engine serial # is 1A323012. I am having issues with it not performing as I'd expect. The boat cranked up and ran fine on rabbit ears. Idled smooth, revved in neutral, sounded good...
  12. dsull

    Boat alarm staying on after cranking motor

    I'm new to the forums but have already found a great deal of useful information so thank you to everyone who contributes. I am having an issue with my 09 Glastron GT 205. It has the 5.0L Mercruiser carbureted motor and an Alpha One Gen 2 lower unit. Engine serial # is 1A323012. I took the boat...
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