Recent content by jbo_c

  1. J

    1978 Johnnyrude control box problem.

    Control box quit going into "full" neutral and reverse this weekend. If I tap back on it as I turn the key, I can just get it to make the circuit so I can crank it. Goes fine forward and into neutral(even though it doesn't think its fully in neutral. Motor goes into reverse fine without the...
  2. J

    Link and sync clarification 1978 70hp

    Just did my l&s and noticed the length of travel for the throttle plates and the timing advance are vastly different. I've got the timing advance set so it starts just before the throttle plates open up, but it is fully advanced against the rubber stop when the throttle is only 25% or so open...
  3. J

    My 1978 70hp Johnson is a heavy drinker. Yours?

    New to this motor. How much fuel should it take? Today I used 4ish gallons in an hour or so of full throttle use. Does that sound right? Jbo
  4. J

    1978 Johnson 70hp Bogging(?) Ideas Needed Tried the usual answers.

    Woke up this new to me motor after 4 years of sitting. Started out by changing lower unit lube, water pump impeller, and rebuilding the carbs before I did anything. Put it on the muffs and it cranked right up. Woohoo! Off to the lake. Put it on the water and it cranked right up. After it...
  5. J

    Remove high speed jet tube? 1978 70hp 'rude

    Can you/should you remove the brass tube in the middle of the carbs when cleaning? Seems like I did once on an older model, but the ones in this motor don't seem to want to come out. Thanks. Jbo
  6. J

    '78 70hp carbs leaking

    After some storage, had all three carbs leaking a little fuel down the front of the intake while choked at start-up. Easy, stuck floats. Rebuilt the carbs(found no varnish or gunk). Same problem. What gives? If it were just one, I'd say I missed something in the rebuild or a piece of trash...
  7. J

    T/T on 1978 70hp

    Refurbing a boat with a 1978 70hp and would like to add tilt/trim to it. What's the easiest/least expensive way? I assume an after market jack plate with T/T? Thanks. Jbo
  8. J

    '63 40hp fuel pump squirt

    Everything on my motor runs fine, but I cranked it up saturday and noticed a fuel squirt coming from a (manufactured) hole in the aft side of the fuel pump. Is my diaphragm gone or could it be something else? What kind of fix are we talking about? Thanks. Jbo
  9. J

    Plug wires on '63 Johnson

    I'm refurbing the ignition system on my '63 40hp and need new plug wires. The book I'm using says I should use copper core wires, not graphite, but I have been to every parts store in town and can't find copper core. Am I asking for the wrong thing? Is there another name for it? What else...
  10. J

    Remote shift connection on '63 OMC 40hp

    I just put new cables on my 1963 Johnson 40hp. There weren't any real instructions with the cables, just which end is which. Now I have a problem. The throttle cable doesn't seem to have enough stroke to get all three positions(F-N-R). It can get any two, but won't quite get the third...
  11. J

    Finding a replacement starter '63 OMC

    The starter on my '63 Johnson is done. It is an old Prestolite model MGD 4002 which isn't made any more as far as I can tell. How can I find out manufacturer and model for a direct replacement? Thanks. Jbo
  12. J

    1963 Johnson 40hp SHOCKING me

    My 1963 Johnson let me down today. I've been tinkering with it and have never used it in the lake. I ran it for about an hour at various times yesterday in a test tank. It was hesitant to idle, but ran ok. However, it did shock me very mildly several times when I touched it. I found a...
  13. J

    Lower unit exchange on 40 Johnson

    How can I find out if a lower unit will exchange with mine? I can't seem to find the answer on my own. I have a Johnson RDS-25 and an opportunity to buy a lower unit off of an RDS-27. I believe those years are 1963 and 1965. How can I determine if the units are interchangeable? Thanks...
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