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  1. K

    Correct Piston Ring Size 1966 Merc 650 65 HP

    :confused: <br />Help.. <br />We have taken our entire motor apart due to having to fix a burnt piston.. We ordered new rings due to a couple of the other's breaking.. The wrong size was given.. Old Merc.com has 3 different parts numbers for a 650.. We already have 39-45153A12.. They are too...
  2. K

    1966 Mercury 650 65 HP No Power

    I have a 1966, Mercury 650, 65hp, 4 cylinder. When I first put the boat in the water it cranks great. It's idled a bit to low but when you give it the gas it runs great. After just a minute or so it's like it just quits running for a millisecond and then starts running fine again. Then it may...
  3. K

    Needing Help

    We took the boat out for a second outing since I reset the points. The first time I took it out it ran great. The second outing and it was running horrible. It's like it had no fire at all. It went from a top speed of 29 ground speed to 6.9 ground speed and acted like it was only running on 1...
  4. K

    Coil Trouble?

    We took the boat out for a second outing since I reset the points. The first time I took it out it ran great. The second outing and it was running horrible. It's like it had no fire at all. It went from a top speed of 29 ground speed to 6.9 ground speed and acted like it was only running on 1...
  5. K

    Mercury 650,65hp Motor Trouble

    I have a 1966, Mercury 650, 65hp, 4 cylinder. When I first put the boat in the water it cranks great. It's idled a bit to low but when you give it the gas it runs great. After just a minute or so it's like it just quits running for a millisecond and then starts running fine again. Then it may...
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