Search results

  1. L

    pressure in upper gear case

    I have a 1984 Mark Twain with a OMC 2.5 liter motor. The out drive is a 400/800 stringer. When i went to change the oil in the upper gear case it had pressure in the case. I first unscrewed the top plug/dipstick and oil came out with pressure behind it. I then pulled the bottom plug and a small...
  2. L

    1955 Johnson RD-17

    Good morning, I just purchased a 1955 Johnson RD-17 and have a couple questions. It is a Rd-17 no letters after the 17. Motor starts and runs but I still replaced the coils and wires to be safe. I did notice some free play in the crank up and down. IS this normal or something I should be...
  3. L

    Mercury 500 broke one of the rods

    Good Afternoon. I have a 1968 Mercury 500 thunderbolt. The connecting rod on #3 cylinder broke and a small piece wen thru the case. I have not taken it apart to see the extent of the damage which i am sure will be interesting. Anyone have any suggestions on a repair? I know i need...
  4. L

    1968 mercury 500 reverse gear removal.

    Hello. 1968 mercury 500 S/N-2408947. I am changing the lower unit seals because it was leaking oil. when i removed the bearing carrier i noticed the thrust washer against the reverse gear has a slight crack. Is the reverse gear pressed into the bearing or is the bearing pressed into the...
  5. L

    1968 mercury 500 #4 cylinder not firing

    I have a 1968 mercury 500 and have noticed that #4 cycles run not firing. All cyclinders have good compression at 130-135 pounds, all plugs are also working with good spark. Any ideas what would chase this. Plug is clean as the day I put it in and seems a bit wet when I pull them. I would assume...
  6. L

    1968 Mercury 500 questions

    Good Morning I a looking for the correct spark plug for a 1968 Mercury 500 outboard with thunderbolt ignition. Also looking for a prop for the same model. Don't know much about props as far as pitch and diameter so am looking for some advice here. Thank you for the help Nick
  7. L

    switch box mercury 500

    Looking for a switch box for 1968 mercury 500. where do i begin to look for one of these guys? looks like the part number is 333-213 a 3 or CDI 114-2986 Thank you
  8. L

    1968 mercury 500 aftermarket distributor cap and rotor

    Good morning I am having a hard time locating a distributor cap and rotor for my 1968 mercury 500. Is has a type two ignition system with a magneto. I find can fond mercury quicksilver parts but they are very expensive. Does anyone know of an aftermarket cap and rotor that will work on...
  9. L

    1968 mercury 500 no spark

    Ok installed new starter and she cranks great. No i do not have any spark. Where do i begin? serial number on the motor is 2408947 Thanks Nick
  10. L

    1968 mercury 500 starter issues

    Good morning to the club I have a 1968 mercury 500 50hp with a starter issue i believe. Had the motor running all seemed fine then motor stalled. I try to restart it and all i get is a clicking sound. When i turn the key to start i only hear a click. The starter doesn’t engage or spin. I cleaned...
  11. L

    Starcraft floor repair

    I have a 1968 Starcraft with a soft floor. Can anyone tell me if this is repairable? If. So how do I go about it Once opened up I realized all the wood stringers are totally rotted Thanks Nick
  12. L

    1968 Mercury 500 questions

    Good afternoon, First let me start with i am new to working on the old motors. That being said i purchased a boat with 1968 Mercury 500 on it. I started cleaning the motor up and wanted to remove the carbs to make sure they were clean. I was unable to get to the carb flange bolts without...
Top