1999 Johnson 50 question(s)

Hello, and thanks in advance for your help.
I have just re-powered my 15 foot Sylvan sea monster boat with a 1999 Johnson 50 with electric trim and tilt. The motor came from a pontoon. I have two questions.
1) When trimmed all the way down, the motor seems to be at too great an angle to the transom. The transom angle on this boat is 14 to 16 degrees. When the boat is level, the motor tucks in too far. I'm afraid to throttle up as the bow will plow. ( I know how to use the TNT) There are three holes where the bottom of the TNT unit bolts through the transom brackets, the hole being used is closest to the boat. Can the TNT be mounted using one of the other sets of holes to keep the motor further out from the transom when trimmed down?

2) In setting up my tachometer, how many pulses per revolution do I need to set the tachometer to so it reads correctly?

Re: 1999 Johnson 50 question(s)

to try and help with the first question...you really dont have to remount the tnt unit...you should be able to pull the pin down there that LIMTS the travel, and place it in a hole further away from the transom...thus preventing the mount from going in as far!!!!

I know on my larger outboard there are actually at least 6 sets of holes to choose from!!!

good luck

MY GUESS on the tach would be 6P

because when i looked at a tach I have sitting on my computer desk at home,( trying to figure my own tach problem!!!!) i remember reading all the choices...most were for 6 cylinder, and one for a 4 cylinder, but wasnt the right pulses, and one was just listed as 6P, with no reference for cylinders(C)

good luck

bob

Re: 1999 Johnson 50 question(s)

Thanks Bob, but the 50 doesn't use a thrust rod (tilt pin), that's why I asked about moving the TNT mount bolt.
Anybody know for sure?

How about the tach pulse (for sure)?? I don't want to install it then pull it out again to set the switch.

Re: 1999 Johnson 50 question(s)

johnson9950 said:

Thanks Bob, but the 50 doesn't use a thrust rod (tilt pin), that's why I asked about moving the TNT mount bolt.
Anybody know for sure?

How about the tach pulse (for sure)?? I don't want to install it then pull it out again to set the switch.

Click to expand...

yeah i just looked at my 2001 50 hp johnson, while it has trim assist and not tnt...I see the three mount hole options....

makes sense that bringing it out to the outer hole is for the purpose you need...

good luck


seems easy and fast to do...

bob