1989 Yamaha Outboard 130 ignition issue?

[whaler17]

I have a '89 Yamaha 130 2 stroke that has an issue I first thought was a fuel issue, but I have cleaned the carbs repeatedly, have replaced the fuel lines, the fuel pump, etc... but the problem persists. What is happening is that the motor will crank and idle just fine when cold. It will run rpms below 3000 or so without a problem, but when I throttle up the motor surges and completely bogs down at times. If I leave the throttle in the forward position after throttling up the motor will run roughly below plane, then will suddenly surge and plane off only to bog down and run roughly again a few minutes later. If I leave the throttle alone it will eventually do the same thing again. When it surges and planes off the engine runs smoothly up to a maximum of about 4500 rpms then will not run any higher rpms. The longest it has kept the higher rpms and run smoothly was about 5 minutes. Could this be either a CDI or a pulser coil issue?

Thanks
HW

[boats.net]

It could be any part of the ignition system, CDI, pulsor coils, charge coils or ignition coils need to test all the ignition.

[conniption]

testing ignition

Testing the ignition( pulsar coils,charge coils,cdi) requires a mechanic I am sure??? how do they test?

[boats.net]

Would need a peak reading voltmeter, ohm meter and service manual to properly test ignition.

[whaler17]

Figured it Out

It was the stator. Plugged up a new one and it runs like it should now.

[farlington99]

how did you figure it out? I have a 89 pro v 150 that sounds like the same thing I have fought this thing for the last couple years. After i rebuild carbs it usually gives me 4-6 hole shots then acts up again now it flat wont turn more than 2000 rpm still starts and idles good and revs under no load. Tired of fighting it just want it fixed. Every time i take to a shop it is the same thing runs good when i pick it up then after a few hole shots it just goes blahhhhhhhhhhhhhhhh and can not get out of water!!!!!

[conniption]

ignition issue?

i am having same problem as whaler17. engine stuttering at different times. ruled out fuel etc. unrelated problem(low oil and overheat lights flashing, no alarm)??? looking for a way to isolate issue without just replacing parts one by one