86 50hp no fire wireing problem????

[metor99]

Hi
I bought a 50hp force 1986 I was told it was running great. I?m replacing a 1986 35hp force. The problem is converting the wires over from a 35hp wiring harness to use on a 50hp force. This is how it breaks down.
35hp harness that is connected to the boat and works with the motor
Start- yellow
Tachometer- purple
Magneto- white
Choke- green
Heat- orange
Battery- red
Magneto- blue
Ground- black

The problem converting to a 86 50hp force on motor wires
Start- yellow
Generator- purple
Tachometer- white
Choke- green
Heat- orange
Battery- red
Ignition- blue
Ground- black

 

[metor99]

Re: 86 50hp no fire wireing problem????

Also does this motor need a battery to run? Can i remove the wires from the wireing block on the motor and still start the moter with a pull rope.

 

[1983rinker]

Re: 86 50hp no fire wireing problem????

dose your boat have a tach??? if not dont worry about it. Hear a basic wiring pic.

 

[metor99]

Re: 86 50hp no fire wireing problem????

No I dont have a tach. What i am trying to do is use my 1986 35hp wireing harness on my 1986 50hp that i just bought. but something is wrong. no fire

 

[metor99]

Re: 86 50hp no fire wireing problem????

Come on where are all the wireing guys at. I cant afford to go to a boat mechanic. I just checked the compression and it is running 120 psi on both cylinders

 

[metor99]

Re: 86 50hp no fire wireing problem????

Here is the wireing pics

first pic is 1986 35 hp old motor

second pic is wires to be attached

third is 1986 50hp to be connected

 

[metor99]

Re: 86 50hp no fire wireing problem????

I have found several wireing diagrams and tried several different combos of wireing. i dont know if i got TAKEN when i bought the motor. I was told it was running good. I am in the process of buying a repair manual. Anyone know the cheapest place. The book should have the trouble shooting steps i hope. I can rebuild this motor in my sleep but wireing issues kill me. Any help with the wireing issue or pics of another motor like mine showing the wireing block would be great.

 

[pipestone guy]

Re: 86 50hp no fire wireing problem????

Hey Meteor99. I'll take a shot at helping ( I hope ). My Seloc manual shows the wires hooked up differently on the starter switch. The 35 HP appears to be a CD ignition, while the 50 HP is magneto. What I would suggest to do is try starting it without using the switch, see if that works.

 

[metor99]

Re: 86 50hp no fire wireing problem????

Hi
What wires if any need to be hooked up to use a pull rope?

 

[jason32038]

Re: 86 50hp no fire wireing problem????

Put the 2 blues from the coils on the blue screw. Purple wire from rectifier to generator screw. Dont worry about the purple if you don't have a tach. Trace the white tachometer wire under the dash and see where it goes. If it goes to the ignition switch then take the solid white wire from the points area and the solid white wire from the coil (looks like there's only 1 coil with the solid white wire) and put them both on the white tachometer screw. You can use the purple under the dash for the tach if you have one. If that doesn't work then check for spark. Check points and test ignition switch. Hopefully i'm right. Take another picture once it's all hooked up and give a good view of where the wires are hooked up and where they are going.

 

[pipestone guy]

Re: 86 50hp no fire wireing problem????

Hi
What wires if any need to be hooked up to use a pull rope?

I am not familiar with the breaker point system. Hopefully someone else can get in here and advise. Sorry

 

[metor99]

Re: 86 50hp no fire wireing problem????

This is the way the wires were hooked up on my 86 35 hp and everything works this way.

Start- yellow
Tachometer- purple
Magneto- white
Choke- green
Heat- orange
Battery- red
Magneto- blue
Ground- black


Now with the new 86 50hp the wireing block on the motor reads like this, and is different from the old 35hp

Start-
Generator-
Tachometer-
Choke-
Heat-
Battery-
Ignition-
Ground-


The key switch is hooked up like this and also worked with the 86 35hp:

m- white
m-blue
s-yellow
c-green
b-red

 

[Nordin]

Re: 86 50hp no fire wireing problem????

Looked at your pics and the 35Hp seem to be a magneto CDI ignition and the 50Hp is a battery igition.
To have spark on the 50Hp you must feed the ignition with 12VDC from the battery.

50Hp wireing engine connetionblock

yellow start
purple charge indication (lamp)
white tach
green choke
blue ign.
red battery
black ground

50Hp keyswitch

yellow S start
green C choke
red B battery
blue I ignition

The keyswitch feed the coils with 12VDC from red (B) to blue (I) in start and runingpossision. When you turn off the key the switch break the ignitioncurcuit to the coils and the engine stops.

 

[metor99]

Re: 86 50hp no fire wireing problem????

IT runs IT runs well not very good. it has a miss and i have to keep choking it to run. but it RUNS. Atleast now i can start the fine adjustments.

The blue wire in the key switch was the problem It was hooked to (m)
not (I)


TY for everyones help
now on to the next problem
why do i have to keep choking it

 

[Nordin]

Re: 86 50hp no fire wireing problem????

Clean the carb, set the flot parallel to the edge of the carbcupesurface.
Set the idlescrew 1 and 1/4 turn ut from the bottom. This is the startset, then you have to do the fineadjustment.