Smoother & faster engine running ?

[cyclops2]

If I tip & lock the 9.9 hp in the shallow water position. It runs faster & smoother. At idle or 1 / 4 throttle neutral or in gear.
Can I buy the other sized main jet to see if it will do the same ?

 

[faztbullet]

Your changing the float/fuel level in carb causing it to run leaner and no you do not want to change jets....

 

[fdrgator]

It also has less exhaust back-pressure in the tilted position.

 

[cyclops2]

I will go with faztbullet.
With a fixed jet size. I had better guess right from 35F to 105F High or low humidity.

Thank you.