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  1. J

    1970's Airguide Sea Speed Tach hookup

    I have had my 1972 15ft trihull for a dozen years now and never thought about hooking up the installed tach as it just had 2 wires that were cut about 6" long.One black and one that looks brown.I have researched these forums and I still can't figure out if it needs the "transmitter" to work as...
  2. J

    72 johnson 50 hp advance and throttle

    I haven't really used this motor much and I'm trying to get it going again. I think I or the shop has me out of adjustment. Local repair shops here in Denver mostly say it's too old for them and I don't really trust the shop they refer me to. 1. When I am advancing the control box to WOT I...
  3. J

    71 Johnson 50 ran great till I put cowling back on

    Took boat out on lake yesterday after carb and water pump rebuild Took cowling off and fine tuned both slow speed adjustment needles. Ran great at all speeds till I put cowling back on, boat would not go past idle apparently needed more air, cowling intake was not blocked. Broke off little key...
  4. J

    Overheating still possible on muffs 71 Johnson 50

    I have replaced the water pump impeller (which was good anyway ) and the thermostat but I am still getting the overheating siren. I am running it on muffs and do detect some water coming from the upper unit, no pee hole apparently on these. I'm also getting some water coming out from the...
  5. J

    71 Johnson 50 prop bearing housing help needed

    I'm stuck on getting the prop shaft bearing housing back into the prop housing. I took off the bearing housing by undoing the 4 bolts and using a puller to get it out of the prop housing. Replaced the 2 back to back seals. I'm stuck on getting the 4 bolts back in, I used 2 long 1/4 28 bolts...
  6. J

    71 Johnson 50 thermostat question

    After taking off the rear plate surrounding the 2 spark plugs I have 2 questions: 1.How do you get the thermostat out? It's located below and off to the side of the lower plug.Was the thermostat part #1 and they built the motor around it? I have used this boat maybe 50 times in fresh water and...
  7. J

    No start 71 Johnson 50hp

    I just rebuilt the carbs and put it all back together along with a new starter. Am at 1 1/2 turns out on low speed needles, have tried different settings. Starter turns great, nice blue spark off boots to plugs. New plugs and tried cleaning and regapping older three sets. New gas twice at 50-1...
  8. J

    starter question

    My 71 Johnson 50hp has always had a problem with the starter cranking for a few seconds and then quitting. It's an American Bosch SMH 12, serial number 01399 Today I pulled the starter apart and the brushes, springs etc were all shot and loose. 1.Can there be anything else besides brushes...
  9. J

    Carpet and Insulation

    I've had my 15' 72 Scott Engineering fiberglass boat for about 5 years now.The other day I ripped out all the carpet as it was original and looked 36 years old.I'm not a boating fanatic, paid $1100 for boat, motor, trlr etc. What should I use for all new carpet that won't break the bank, I'm...
  10. J

    Carb Problems

    I have a 72 50hp Johnson that I have had for about a year along with a 15ft fiberglass boat. I have trouble with it dieing on me at idle or when I shift into forward.I have a workbook that covers too many different years and motors to be a big help. Specifics: I have dual carbs and a low speed...
  11. J

    1972 Johnson 35hp won't start

    I am new to this boat and motor.I have tried 3 batteries and all I get is a click from the motor.It's an electric start and when the key is turned all I get is a click.All batteries are shown to be strong per my battery tester.I am getting juice to the solenoid per my 12v test light but I'm not...
  12. J

    BROKEN STEERING CABLE

    I bought a 1972 Johnson outboard with hydro matic steering about a month ago.Yesterday I had only left turns.The steering cable came loose where it exits the side of the boat about 2 ft from the motor.What is exposed are about 30 strands of wire that I imagine are there to stiffen the casing to...
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