[upthesaukee]

Originally Posted by thinkxingu

Anyone know what that black button on the side of the shifter handle does?! (Be gentle, if I should know!)Attachment 16344

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Yes, as Dan said.

On a cold start, I pushed the button in, moved throttle to wide open and return it to just before neutral. Turn key to start the engine. I'd run at that slightly higher RPM for about 30 seconds, then pull throttle back to neutral (button pops back out), which returns the RPMs to normal idle. Throttle is now ready for normal operation.

I did this on my Mercruiser, and I believe with my Mercury 135 Optimax O/B.

Dave