90hp 2 stroke - no carb synchronisation ??

[Searider]

Hi ,
Can somebody tell me why the old 90hp 2 stroke Yamaha have no option to synchronize the carbs ??
I have also a F100A and after fine tuning / sync of the carbs the low idle was very very smooth .
Why the 2 stroke engines do not need synchronization ??
If I would run the motor with premixed fuel I could use the nipples where the 3 oil hoses are connected to the intake system - but again - nothing to adjust on the carbs ..
Also the workshop manual does not mention anything ..

Cheers - Jürgen

[boats.net]

They do need to be sync but not with a vacumn sync meter, you adjust the linkage so that all throttle plates are completey closed, the steps are in your service manual.

[Searider]

Many thanks !