dess key

[hal5778]

Hello I am asking if I change my MPEM and matching dess key do I have to change the dess key post as well with the post that was with the new dess key?

 

[artr]

not necessary to change post.

 

[Stevie96xp]

Nope the key is programmed to the MPEM and the post is just a connection from the key to the mpem

 

[Jaysurfsalot]

Bypass that dang dess post!

 

[Jaysurfsalot]

97 Seadoo gsi owned 3 years and burnt myself out with the terrible dess key issues.

This evening I finally took time to figure out how to wire in my dess key permanently and also wired in a generic marine kill switch and lanyard (needs to be normally open). Everything works perfectly gauges/start/stop/beeps/etc.
$20 for the safety kill switch and lanyard. No other purchases necessary.

Here's what I did. Then, just use a N.O. kill and put between number 1 and solid black wire. When the lanyard is pulled, it will open the circuit by removing that ground signal. Cheers.

 

[Jaysurfsalot]

This was my test circuit using the key internals:

 

[Jaysurfsalot]

Lanyard kill using a generic marine kill switch and lanyard (normally open), between the yellow/black and number 3.

 

[Jaysurfsalot]

If anyone has any carborated engine and wants to remove the ecu entirely, first understand the basics and follow the directions below:

For the engine to run it needs first,

1 fuel: (mechanically done and timed by the thin metal disc behind the carbs) we are good there.

2 Spark : Mechanically timed and sent by the flywheel coils/magnets. We are good there, just need to wire stator to the coil directly and then to the plugs. Now we are good there.

Start : have to run a curcuit from battery - to starter, and battery positive to a n.o. momentary switch, and from same switch to solenoid +, solenoid - to battery -, solenoid main+ to battery, solenoid main+ to starter +. We are good there.

Stop: easiest method is to use a dpst switch and have a wire going to battery - then jumped to each isolated pair on dpst switch, and a wire from first pair on dpst switch to plug 1,and a wire from second pair on dpst switch to plug 2 (this type of switch has 4 connections, each pair isolated from each other, see left illustration). When pressed, grounds spark killing engine. We are good there. (can also just use a basic n.c. lanyard kill if you wanted to just have that as the kill)

 

[Jaysurfsalot]

Lanyard kill diagram if using the above new stop circuit:

 

[Jaysurfsalot]

Here's the finished dess bypass video

 

[Jaysurfsalot]

Hello I am asking if I change my MPEM and matching dess key do I have to change the dess key post as well with the post that was with the new dess key?