Yamaha 80 HP 2-stroke - timing

[AvantosA4]

Here is the problem... 89-90 80 AETOL 2-stroke outboard

The motor smokes too much. How to set the ignition timing?

What is the value of ATDC and BTDC for this motor?

Thanks much!

 

[rodbolt]

Re: Yamaha 80 HP 2-stroke - timing

cant help much other than to tell you ign timing isnt your smoking problem.
aeto will indicate its either an 84 or 85 US market motor or an non US market motor.
you will find idle timing in the 5*atdc range and WOT timing in the 18-20* BTDC range.
but first you must identify the motor in questions market as various countries had different specs for the same basic engine.

 

[AvantosA4]

Re: Yamaha 80 HP 2-stroke - timing

Thank You very much.
You are right.
The motor is different.
Best regards.