The best solution is the find a service manual for that motor. I have seen these in libraries and they are for sale on the internet.
The service manual is located at the related link below.
for most of these motors any tech manual from Johnson would mostly cover 90% of all of you questions... however wiring schematics are very diffrent and I have been looking for a wiring diagram for a Johnson stinger II motor, not included in any recent manuals, so if anyone knows where to find one let me know
electrical connections from motor to remote controls color code
How old is a Johnson 60 HP outboard motor serial G7050973
Johnson 4hp outboard bj4brcud
Your local library is a good source for outboard repair manuals including the wiring diagrams. Most libraries now are on a network with area or Statewide libraries and books can be sent directly to you.
I have a 1972 85esl72 Johnson outboard motor and I use a 50:1 ratio.
the motor is a 1967 outboard
25:1
A 200 hp Johnson outboard, model number J200STLCDR is a 1986 year model.
That is a 1956, 30HP Johnson motor.
A Johnson outboard, model number LT-10, would be a 1940 model, 5 hp motor.