96 Speedster Ecu?

[mackiewayne]

Wow on the lake one engine quit ...No spark
all fuses good..any suggestions...
i checked with a local mec.
he said it could be the ecu?
HELP!
,:blush:,

 

[Dr Honda]

Could be. Its hard to say until you do some trouble shooting. BUT... MPEM's don't normally die for no reason. I would be more willing to think it was a loose wire, a CDI or a mag coil.

 

[mackiewayne]

Thanks Dr. Im checking it out today and will get back to you!

 

[mackiewayne]

No Spark

so i cut the ecu wire still no spark
Could it be the rectifier?
Im checking the coil soon
Thanks Doc!

 

[mackiewayne]

Checked the coils they both came in at 1.2 mh
Im gonna swap rectifiers as maybe thats it?

 

[mackiewayne]

Swapped rectifiers no change
mag coil Looks like
Any instructions as to test and change

 

[mackiewayne]

That happend with my norton when the mag went Dead
nothin worked....mmmm

 

[Dr Honda]

The rectifier isn't going to be the problem. The ignition on the 720 engine is self contained and simple.

There is a pulser coil in the MAG. one wire comes from it to the CDI/ignition coil. (one unit) Some where on that wire, there is a wire going to the MPEM that is used to kill the engine, and act as the rev-limiter.

If you disconnect that wire... all it can be is the MAG coil, or the CDI. BTW... if you disconnect that wire... it can't be the MPEM.


I would swap the CDI/ignition coils, and see what happens.

 

[mackiewayne]

:hurray:
Looks like the mag
the good mag reads 50 ohms
and the bad one is open?
Looks like the problem
Get out the wrenches...LOL
I love to tinker

 

[mackiewayne]

ok these are the 717 engines?

 

[mackiewayne]

Can i do the mag coil in the boat?
I dont have the shop manual

 

[mackiewayne]

Hey Doc You Rock!

Thanks so much for all your help in gettin me going in the right direction!
Awesome Thank you forum ! Ill be back on the water soon!

 

[mackiewayne]

Runnin Again!

I want To thank the great people who helped me with my engine issue Your Great
From the exellent advice troubleshooting
to assistance with removing the engine
It all worked great thank you forum Staffers and supporters!
I now know alot more about my boat
also i got my bud one just like it so i know where to send him for help too
Thanks again!