Merc Cowling off, Idle high...

[1BadTitan]

I was just thinking of general performance theory, engines need to breath easy. Is this not true with 2 strokes? When I pulled that cowling, the engine woke up like a breath of fresh air... Literally

[THEFERMANATOR]

Originally Posted by 1BadTitan

I was just thinking of general performance theory, engines need to breath easy. Is this not true with 2 strokes? When I pulled that cowling, the engine woke up like a breath of fresh air... Literally

You puled the cowling off and it leaned out at idle is why it woke up. And 2 strokes do NOT like to be run lean at ALL! you can open up the cowling, remove the air box, and install airhorns on it for a performance gain. BUT you will also have to rejet the carbs, and be prepared for a melted piston or 2 in the process if your not careful. 2 strokes are VERY sensitive to any airflow change, even the slightest airflow change can make the difference between one living for 5000 hours or grenading shooting a rod through the block.

[1BadTitan]

Well that settles it... No vents then. Thanks

[reelapeelin]

Originally Posted by THEFERMANATOR

You puled the cowling off and it leaned out at idle is why it woke up. And 2 strokes do NOT like to be run lean at ALL! you can open up the cowling, remove the air box, and install airhorns on it for a performance gain. BUT you will also have to rejet the carbs, and be prepared for a melted piston or 2 in the process if your not careful. 2 strokes are VERY sensitive to any airflow change, even the slightest airflow change can make the difference between one living for 5000 hours or grenading shooting a rod through the block.

I hope the difference in elevation and air pressure from the Foothills of SC to the coast of NC didn't cause mine to scorch a cylinder...I'd hate to think they are THAT sensitive...naaaa