83 jonhson 70hp 3yl 2stk weird start

[jesusn]

ok heres the thing my motor starts in the drive way first or second rotation , runs fine no problems . take it to the water and it takes a few tries itll start up then die ending somtimes with a sneese . but after it does this mabey once or twice it will stay on when at runing temp no problems at all it will even start up first roiation but once cooled down ruff start again , i already did a major tune up this season but problem still there. tune up consisted of spark pugs n wires gas/pump/filter, gas lines, gastank, carbkits, gearlube, impeler,compretion check. this problem have me n my friends all stumped cus there is no problems in the drive way but *** soon as i hit the water she acts up any help or ideas ?

 

[patrick4266]

Re: 83 jonhson 70hp 3yl 2stk weird start

I had same motor, did the same thing, timed it problem fixed

 

[jesusn]

Re: 83 jonhson 70hp 3yl 2stk weird start

did you do it your self or did the shop do it ? if you did it how did you do it?

 

[jtexas]

Re: 83 jonhson 70hp 3yl 2stk weird start

ok first understand, there's no correlation between how it runs on the muffs and how it will run in the water. When the prop's submerged, there's backpressure on the underwater exhaust.

2nd, the difference between cold start and warm start procedure.
Cold start:
1. Squeeze primer bulb until firm.
2. Open the tank vent.
3. Lift hi-idle lever full up.
4. Turn the key to "on" while simultaneously pushing it in (to prime). Hold it in for 5 or 7 seconds.
5. Keep holding the key in while turning it over to "start."
6. Release the key when the motor starts (it might take 3 or 5 rotations), and pull the hi-idle lever back to where it's just enough to keep it running. If it starts to die out, punching the choke usually keeps it going. Give her a few minutes to warm up.

Warm start:
1. Turn the key to "start" and release.