Search results

  1. D

    T Stat Q

    How long should it take for t stat to open and for water to come out of exhast holes middle ways up leg housing? Pee hole sprays water like a champ. 1978 25 Johnson
  2. D

    More Johnson Problems

    This is probably about the 6th problem i have had with this motor. After changing the lower unit with a completley different lower unit, I cant get the motor to pump water. As i have been told, i 1st, took lower unit apart, replaced impeller put back together. nothing. 2nd bought new t stat...
  3. D

    Cooling Question

    Alright , just replaced the thermostat and gasket and spring on my 1978 25 hp johnson. Reason for replacing was motor overheated becuase no water was coming out of pee hole. After replacing, started motor in a tank but could only get barely a mist, out of exhaust holes and nothing out of pee...
  4. D

    Motor revving

    Have a 1983 25hp Chrysler. the question i have is what would make motor want to rev going full throttle down the lake? Every once in a whil it will suddenly start to rev up pretty high while slowing down a little and then quite. also at idle my motor systems to want to spit/sputter and kind...
  5. D

    Correct Prop Size?

    Okay I have a 1983 25hp Chrysler motor, on a 2006 16ft. aluminum modv jon boat. My question is what would be a good prop size and pitch for this motor? It will be pushing 2 batteries, gas taank probly 2-3 people and decoys for duck hunting, Probably aroungd 800- 900 lbs , not including motor...
  6. D

    Johnson Q

    Just got done reading post about adding a pee hole, and i realized that i have a pee hole outlet and hose on my motor. It is a 1978 25hp Johnson. I always thought that the only water outlet on my motor was the 2 holes on back of leg housing. This pee hole i found has never sprayed water since...
  7. D

    25 hp conversion?

    Any body ever tried to convert a 25hp Chrysler to a 30 or 35? Currently have a 1983 25 hp on a 16ft. jon boat. Was wanting a little more umphh out of it. Didn't know how hard it would be or if it was worth it. Have a Chrysler/Force dealer/ mechanic nearby so parts wouldn't be much trouble.
  8. D

    Motor Overheated!

    Ok im back again with my 25 hp 1978 JOhnson. Finally got motor started. Took to lake to run it. Started up and checked exhaust to see if it was pumping water. Was pumping water, but not as much as i thought it should. Thought it wouldn't be a prob seeing how i was just going to check and make...
  9. D

    Testing Elect. Ignition

    Is there any way to test the electronic ignition or powerpack on a 1978 25 hp Johnson? Also can the electronic ignition work sometimes or intermittenly(spelling?) if its going bad or when it goes bad does it just quite working altogtether? Also the what exactly does the idle screw do on the...
  10. D

    Throttle Question?

    Should the back butterfly valve on a 1978 25 hp johnsons carb be wide open when throttle handle is turned to full throttle? Im not talkin about the choke valve but i guess the throttle valve, behind it. Reason i ask is cause when i turn my throttle all the way open the throttle valve only...
  11. D

    1978 25 Hp Johnson

    This is the second part of my question which i posted a couple a days ago. I was wondering could the cause of my hard to pull rope, and the motor not starting, be the points and condensers? i know for a fact that these haven't been replaced in long time. Also how would i go about replacing/...
  12. D

    25 johnson want start.

    heres my problem guys. i have a 78 25hp johnson manual start motor. My problem is a after taking lower unit and drive shaft off to check gears and then repalcaing everyting, which i pretty sure i did correctly, i go to take the boat out. After leaving dock going slow the motor starts to slow...
  13. D

    25 Johnson HELP!

    Hi, i have a 78 25 hp johnson and my problem is that the other day after replacing lower unit with new one i went to pull start motor, and the rope wants to keep the same tension the whole pull. usually the tension is strong at first then it lightens and fires. I took both plugs off and with...
View older results
Top