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  1. M

    1972 mercury 800 thunderbolt

    I just bought a 1972 merc 800 thunderbolt outboard which I was told that sat for about a year,the internal wire harness was shot I rewired the whole thing,I changed the rectifier old one was no good,hooked her up after the third key turn she started right up but the engine reved up way to high I...
  2. M

    1972 mercury 80hp 800 thunderbolt tachometer

    Hi, I have a tachometer which I dont know if its compatible with my outboard (here is a pic of the back side) can I use this tach on my 1972 mercury 800 thunderbolt, what should I dial it too on the pulses cyl dial, it has a 2p-4c,4p-6c,4p-8c,5p and a 6p,hope someone can help,Thanks.
  3. M

    1972 mercury 80hp 800 thunderbolt

    Hi, I was wondering if anybody out there knew were I can find the temprature sender for this outboard engine if it had one or where on the engine can I install one if it did not have one,any input would be greatly appreciated. Thanks
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