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  1. J

    what year is my mariner

    I have a 40BM, I was wondering what year it is. I don't want to have someone tell me what year it is, I want someone to tell me how to find that info on my own. I have looked at several posts on here that are similar where you just tell them the year, well I want to know where to find it...
  2. J

    correct angle of motor on boat

    I took out our 14' fiberglass boat with a 50hp johnson, and the GPS said we were going 29mph. I thought this boat would move a little faster than that, since the bottom has frest paint on it. I noticed yesterday that the tilt of the motor was off a little. the motor was tilted down too far...
  3. J

    do I need a different prop?

    I have a boat that is 14' long, and weighs 570lbs. by itself. It has a 1983 johnson 50 hp motor on it. My buddy and I were in it (300lbs. total) and we were cruising at 29 mph on the GPS. Other weight would have been 6 gal. of gas and a battery. The prop is labeled 12-1/2x13. Are we getting...
  4. J

    1971 shell lake/lund how to tell if foam is wet?

    We are just getting ready to paint what I beleive is a 1971 shell lake boat, which I beleive was made by lund. It is a 14' runabout, fiberglass. It is still new to my buddy and I. We have a 50hp johnson on it and I would guess that it goes about 30mph with the two of us in it. I didnt have...
  5. J

    mariner pee hole not peeing

    I have a 40hp mariner tiller that worked fine for the last two seasons, but I put it up for the winter, it was covered all winter, and now the pee hole doesn't seem to spit any water. There should always be water coming out of there right? there is water coming out of the exhaust holes below...
  6. J

    cheap paintjob on an old fiberglass boat

    we are going to paint an old fiberglass boat to look like the general lee. We are using vansickle allis chalmers orange paint from farm & home. We just plan on lightly sanding the boat and them putting the paint directly on over that. Is there really any need for a primer? Also we were...
  7. J

    How can I bypass the neutral safety/start switch on a 1972 20hp johnson?

    I was just wondering how to do this. It doesnt work properly because I have to wiggle the shifter handle and get it into the right position to get it to start, so I was just going to bypass it.
  8. J

    1972 20hp johnson not running properly

    I have posted about this problem last winter, but now that spring is here I want to bring it up again. 1972, johnson 20hp, electric start, long shaft. when I got is last fall it would start but not run for more than a few seconds and it would immediately die if you would give it any throttle...
  9. J

    prop question on 1983 johnson 50hp

    my buddy and I have a boat with a 1983 johnson 50hp motor on it. The prop it has on it right now is a 12-1/2x13. I don't know what this number means for sure. Previously this particular boat and motor have not been together as a unit. The boat is a pretty light 14' fiberglass runabout. It...
  10. J

    Anyone tried NEW pulstar spark plugs?

    I read about pulstar spark plugs in my field and stream magazine, just wondering if anyone had tried them in a vehicle or boat motor. If so how do they perform? Does anyone know if they can hurt a boat motor? If you are curious go to pulstarplug dot com. The downside is they are $25 each!!
  11. J

    how much difference can a decarb make?

    I have a 40c tohatsu that I havent run in a couple of years because I thought the compression was a little low. If my memory serves me right it was in the low to mid 90's. I am sure this motor has never had a decarb done to it and it is probably from the 80's, so how much would a decarb help...
  12. J

    how to read a sparkplug?

    I finally got my 20hp johnson to running by cleaning the points up a little. But when I shut it off I took the plugs out to take a look and the top one was black and oily, but the bottom one was black and dry. What does/could this mean? Also the manual calls for a champion J4J plug, and mine...
  13. J

    It's me again...1972 johnson 20hp not running well

    Here is what I have done/know: -fuel is good, new gas lines, tank is clean, primerbulb retains pressure, relief valve is open -new impeller -carb kit installed, new needle valve that is turned 1 and 1/2 turns out -all new wiring from key switch to battery and solenoids. -spark was good last...
  14. J

    how do I test a starter solenoid?

    I just rewired my johnson 20hp because of corrosion issues. This motor is new to me, and after the rewire the starter wont engage by using the key. I know the starter is good, but maybe it is the solenoid. How can I check to see if that is my problem, using a voltmeter. The electric choke...
  15. J

    why does my 72' johnson have some 73' wiring?

    I was just looking at my manual and noticed some things. My motor is a 72' but it has some of the same wiring as the 73-76 models. Mine has the 72' key swith/choke assembly, but it has the male/female connections like the 73'-76'. According to the manual mine should also have a green wire that...
  16. J

    1972 johnson 20hp wiring help

    I am i the process of hard wiring my 20 hp johnson 1972 model, but I have a few questions. My male/female connection point was corroded, so I thought I would hard wire everything. I noticed once I had everything apart that there is 5 small wires coming out the female side, but only 4 small...
  17. J

    johnson wiring harness plug

    I have a 1972 20hp johnson, with electric start and choke. The problem is that the female end that plugs onto the motor is all weathered and cracking. My question is can I just get that plug end with like pigtales on it and splice it on? I don't think the wires come out because it looks like...
  18. J

    oil seeping from lower unit after motor has run in tank

    I have been running a 20hp johnson in a tank to try and make it water worthy, and I have noticed that after I run it in a tank, black oil runs out of holes in the lower unit. I was wondering if this is normal. It is coming out of tiny holes above the water inlet for the impeller, probably...
  19. J

    spraying sea foam deep creep into carb

    I am getting ready to start my 20hp johnson in a barrel to see if fuel delivery is my problem for the motor not running for more than a few seconds. I was wondering, since I am having a hard time finding anything around the shop to use for a spray bottle, if I could just use some sea foam in...
  20. J

    wondering how the 3.0 merc 165 would perform on a 20' boat

    I just saw a boat for sale that caught my eye. It is a 20' open bow with a 3.0 merc, which they said was 165hp, how would that perform on the water? Would it be plenty of power? I wonder how fast it would go?
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