No kill with the button! '89 John 15hp

oujakov · 26 July 2009, 00:58

The power kill button does not work on '89 Johnson 15hp 2-stroke.
To kill the motor you have to choke it or disconnect the fuel hose. Choking actually worked well.
I've other Internet resources and some suggest it is either actual kill button that's not functioning or there could be lost/bad ground. I've checked the ground and reattached it, but I have no barrel to test run, so I have to wait until next weekend when I go to the lake.

Any other ideas as why the button not working?
Does it somehow affects the motor power (it is incorporated into the power pack)?

Jizm · 26 July 2009, 08:06

The kill switch is usually a short to earth, use a multimeter to check it when pushed.

Nos4r2 · 26 July 2009, 10:30

Quote:

Originally Posted by Jizm

The kill switch is usually a short to earth, use a multimeter to check it when pushed.

Yep.

I'd replace it with a killcord.

oujakov · 26 July 2009, 16:28

The kill switch is connected to the cord.

I'll try to set up test bench with water bucket to try running and shitting down the motor.

bazza · 26 July 2009, 16:40

Quote:

Originally Posted by oujakov

The kill switch is connected to the cord.

I'll try to set up test bench with water bucket to try running and shitting down the motor.

I dont know if that will help....LMAO

willk · 26 July 2009, 20:58

Quote:

Originally Posted by bazza

I dont know if that will help....LMAO

You never know, "Turd toime lucky", as we say over here!

BMBL!

oujakov · 27 July 2009, 02:49

Quote:

Originally Posted by bazza

I dont know if that will help....LMAO

Viola spell checker!

Definitely there were no spelling errors detected.

m chappelow · 27 July 2009, 08:45

9 times out of ten its usually the switch that has corrosion on it which then causes a bad earth ,some people tend to leave the cord in the running position when in storage ,so it wont get lost but that can lead to an air gap ,then the switch contacts going green with corrosion ,then it wont earth out when you need to stop, try take the switch apart and clean up the contacts , mart

oujakov · 27 July 2009, 12:23

I'll check the switch and the ground.

Does it somehow affects the motor power (it is incorporated into the power pack)?

9D280 · 27 July 2009, 16:27

It'll only affect the power in as much as you'll get absolutely no power if it's shorted the ignition....

It won't degrade power, but as you have proved, as it's a "push to make" switch, it fails in the "run" position!

oujakov · 30 July 2009, 04:06

On the second note, it is a pull switch. According to you I should have full power!
Sweet.

I regrounded the main ground, but did not get to the switch to check the wiring. With the small baby on your hands there is just some sacrifices you need to make....none the less I did barrel test, engine was not willing to start, it got me a little upset. I decided to recheck for the usual fuel and spark. I started with the fuel and realized that the fuel hose was connected backwards, that actually "fixed me" as why there was no pressure present in the bubble from the start.

Anyways reversing the fuel line helped, the fuel pressure appeared and engine started in the first few pulls. The friken kill switch did not work. So now I know it is definitely not the main ground.

As per previous owner there is a brand new powerpack installed and the kill switched worked, but after several attempted refused...I'm thinking the problem is with connections or oxidation on the wires (that I can't see).

Anyone has a web link to the schematics of the tiller handle (type 3) with the kill switch located right at the top of the handle?
I want to take it apart and see if the actual switch might be the culprit.

Jizm · 30 July 2009, 07:36

Quote:

Originally Posted by oujakov

On the second note, it is a pull switch. According to you I should have full power!
Sweet.

I regrounded the main ground, but did not get to the switch to check the wiring. With the small baby on your hands there is just some sacrifices you need to make....none the less I did barrel test, engine was not willing to start, it got me a little upset. I decided to recheck for the usual fuel and spark. I started with the fuel and realized that the fuel hose was connected backwards, that actually "fixed me" as why there was no pressure present in the bubble from the start.

Anyways reversing the fuel line helped, the fuel pressure appeared and engine started in the first few pulls. The friken kill switch did not work. So now I know it is definitely not the main ground.

As per previous owner there is a brand new powerpack installed and the kill switched worked, but after several attempted refused...I'm thinking the problem is with connections or oxidation on the wires (that I can't see).

Anyone has a web link to the schematics of the tiller handle (type 3) with the kill switch located right at the top of the handle?
I want to take it apart and see if the actual switch might be the culprit.

"If in doubt, link it out"

Try linking out the kill switch instead with a new piece of wire...

oujakov · 30 July 2009, 22:50

Tested the kill button and it works. I get the signal in the closed position and opposite in the open position. Also tested the connections for the ground and the plus (?). both worked.

I guess i have to leave with this, as I don't feel like spending 100.00 for new powerpack.

Is there anything I can do to make engine stop wile I'm falling out of the boat?

Poly · 30 July 2009, 23:07

Quote:

Originally Posted by oujakov

Is there anything I can do to make engine stop wile I'm falling out of the boat?

I would just retrofit something like this in addition to the existing dodgy circuit.

oujakov · 31 July 2009, 02:23

Thanks for the ebay thingy.
The actual switch works and wiring to the powerpack unit seems to be working as well.

Poly · 31 July 2009, 08:39

Quote:

Originally Posted by oujakov

Thanks for the ebay thingy.
The actual switch works and wiring to the powerpack unit seems to be working as well.

I'm not sure what you mean by "powerpack unit" - but my understanding is that these kill cords mostly work the same way - when you press the button or pull the cord it shorts out the electrics so you get no spark. To my simple mind - there was nothing clever going on, so if the switch and wiring both work as intended then it kind of has to work?

oujakov · 31 July 2009, 13:27

Powerpack is in a way a very simple onboard CPU, that is designed to manage spark comming to the engine. There are several wires comming out of it, and 2 of them are suppose to be connected to the killswitch. Once thise wires shorted between each other it makes motor stop. What is happening, is that even when you by pass the kill shitch and short wires - motor keeps running.
Since I cheked the switch and wires and with my voltmenter it had showing to be operation, it makes me think now that something inside that powerpack is malfunctioning.

As, well as I'm not sure if there could be anything else, other than the switch and the p.pack, that creates this "no kill" situation possible.

Poly · 31 July 2009, 14:00

Quote:

Originally Posted by oujakov

Powerpack is in a way a very simple onboard CPU, that is designed to manage spark comming to the engine. There are several wires comming out of it, and 2 of them are suppose to be connected to the killswitch. Once thise wires shorted between each other it makes motor stop. What is happening, is that even when you by pass the kill shitch and short wires - motor keeps running.
Since I cheked the switch and wires and with my voltmenter it had showing to be operation, it makes me think now that something inside that powerpack is malfunctioning.

As, well as I'm not sure if there could be anything else, other than the switch and the p.pack, that creates this "no kill" situation possible.

I'm probably asking the obvious here - but are the connection into the powerpack good then? is it a sealed unit - or can you check the connections on the inside?

oujakov · 31 July 2009, 14:23

To check the power pack connections you have to take the flywheel off. I might do this sometime later, as I'll be going boating this weekend.