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  1. G

    control hook up?

    I just got a 1970 Thunderbolt 500 and am trying to hook up the controls. Seems to be a little different than my I/O as there is 2. I can identify the forward reverse but not sure where it hooks up. What is the other cable? Is it some sort of advance? There is also 2 connections in the motor but...
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    Another 470 getting warm

    "So just how much water should "So just how much water should an impeller pump? 1979 470 w/ heat exchanger. I put a new impeller in last week. The old one was missing a fin. This impeller really never pumped that much water to begin with. Never a steady stream.....more like a light rain. I...
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    Early model sterndive identification

    I have a 1979 470. I finally w I have a 1979 470. I finally wore out the engine coupler and had no problem finding a replacement. On reassembly I decided a drive yoke replacement would be the best move. It has some play when installed into the coupler. My supply store told me there is 2...
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    50 hp thunderbolt

    I just bought an old wood boat I just bought an old wood boat and the owner could not find the key. Any wiring diagrams out there for this motor or anyone know which wire to power to make the ignition hot??
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    OMCMercruiser question

    "OK, OK I knew that would get "OK, OK I knew that would get a few of ya reading! I have been a merc guy for a bit i guess.I have that one handled as it is a '79 and i've fixed everything twice and a couple of things 3 times. I am looking at a winter project to keep me outta trouble. It's...
  6. G

    470wont charge

    ok ok i checked it all by the ok ok i checked it all by the book....put the battery in my truck for 5 days....took the boat out for 1 hour and have a dead battery. I checked for continuity at the bat cables with bat removed and show about 3 ohms???? should there be any continuity with the key...
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