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  1. zonaman

    Tach wiring for a '67 Thunderbolt 500?

    I've got a tachometer I'd like to wire up tp my 1967 Mercury Thunderbolt 500. The starter battery for engine is separate from the one I use to run accessories (i.e. instrument lights). How do I wire this up? I'm not familiar (yet) with this ignition system other than to note it doens't seem to...
  2. zonaman

    Start or Deep Cycle?

    I need a new battery to run my accessories (12v system) : * pair of 55 watt docking lights * 500 gph auto bilge * nav & anchor lights * horn * fish finder I'm going to add a 2nd sonar and a searchlight at some point. It came with a deep cycle but I'm not sure that's best. Do I go with start...
  3. zonaman

    "Tupperware" Fuse Box

    Here's an idea for a water resistant fuse box- I used a plastic food storage tub. Cut two holes in the back, added some rubber grommets for the wires to pass through, The cover even has a vent hole to inhibit the formation of condensation.
  4. zonaman

    Auto bilge switch question

    Need some advice wiring an auto bilge switch (refer to attached diagram). The Attwood folks have the brown wire (E) going to the on/off switch (C) on the bilge pump side and the red wire (D) going to the on/off switch on the fuse/power side. That's about 13 feet for each color wire to connect...
  5. zonaman

    Fuel Filter Water Separator?

    I have a 1967 50 HP, 2 stroke of course, I suspect may be having some problems with ethanol fuel absorbing water. Can a fuel filter/water separator be added to the fuel line on these? If so which one would you recommend? Thanks.
  6. zonaman

    Instrumentation for a '67 500?

    I've got a '67 500 Thunderbolt with no instrumentation. I believe the controls are a later model than the engine. There are wires coming out of the control- Brown, black, purple, tan/blue stripe, and gray. The are not connected to anything. There is a harness that is plugged into the motor...
  7. zonaman

    My First Merc

    I've owned several outboards, but never a Mercury, till now (1967 500 Thunderbolt). All the props I've had before were held on with castle nuts. The Merc looks like it's held on by a large lock nut. Is it? Thanks
  8. zonaman

    Year Please?

    Mercury 500, 50 HP "Thunderbolt" serial # 2214875. What year is this, please?
  9. zonaman

    Cracked Exhaust Manifold?

    My 1962 500 Thunderbolt has a crack in what I'm guessing is my exhaust manifold. Is it? Big problem or deal with it later? Thanks.
  10. zonaman

    Shop manual for a 1962 50 hp Thunderboltu.

    Hello! I just came into possesion of 1962 Mercury Thunderbolt 50 hp in execellent condition and I'd like to keep it that way. I noticed the Solec publications only cover back to 1965. Was there any type of shop maunual for this motor? If so I'd like to try and find an out of print copy. Any...
  11. zonaman

    What are these vents for?

    2000 90 horse Johnson. Vents just above cavitation plate. Water intakes are on bottom end. Thanks.
  12. zonaman

    Propeller Spacer Critical?

    I have a 2000, 90 horse Johnson, model #RJ90PLSSE, I removed the propeller and noticed that the diagram shows a "spacer" behind the propeller nut. Is that part mission critical? My unit was missing this part. Can a suitable replacment be found at my local hardware store or is that a trip to...
  13. zonaman

    90 horse Johnson Stability Question

    Just got back from the lake where I took my '59 Dorsett with the 2000 , 90 horse Johnson out for the first time. It got up out of the hole very quickly and planed out nice. Then at about 4000 rpm about 30 mph, the steering would go loose and it would turn to one side, when your correct it by...
  14. zonaman

    Tachometer Question

    I've got a new tachometer that I'm attempting to wire. It's a Telefex Red International 7000 rpm. I notice that the needle is resting on the 500 rpm mark. Shouldn't that be on zero? Is there something wrong with the guage? Thanks.
  15. zonaman

    Johnson 90 Need Wiring Help Please

    I have a 2000, 90 horse Johnson, model #RJ90PLSSE. I'm wiring up the guages right now and I would like help sorting out my wiring harness. The bundle terminates at the console in 4 separate groups (please refer to photo) *One has an 8 pin connecter which I've been told is for the tach/engine...
  16. zonaman

    Accessories Wiring, Thought I'd Better Ask

    I'm trying to rewire the accessories on my boat. This is how it's set up and I thought I'd better have you folks check it out and advise me on any obvious blunders: The battery is located near the back of the boat while the fuse block is under the pilots console, connected by about 12 feet of...
  17. zonaman

    Oil Injection Questions

    I've got a 2000 Johnson 90 hp with the oil injection system in it that I'm getting ready to put on the water for the first time.(since I bought it) I noticed that the manual indicates running 50:1 in the gas tank after the hose has been disconected along with the oil drwn from the oil tank. It...
  18. zonaman

    Standard wiring colors?

    I'm getting ready to wire up the accessories on my '59 Dorsett Catalina. Are there standard wiring colors for that? Seems like bilge pumps and/or livewells are always brown. I'm including a horn, nav lights, bilge & livewell, search light, a blower, sonar, cabin lighting, and the guages- fuel...
  19. zonaman

    Bondo Fiberglass Resin Jelly

    Is Bondo Fiberglass Resin Jelly suitable for repairing hairline cracks on an old (1959) fiberglass boat hull bottom? Thanks.
  20. zonaman

    How to Mend Broken Windshield Pillar

    I've got an old fiberglass cabin cruiser with a couple of broken window pillars. How would I repair these? Thanks
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