I have a 2004 Yamaha F60 (F60TLRC). I have the Yamaha service manual along with the supplementary manual (basically F50 manual + differences for the F60).
This past fall, during winterizing, the engine was 'sneezing' ever so slightly. Over the winter, I completely disassembled the carbs, cleaning them in a heated ultrasonic bath. That included removing the brass plugs and the underlying A/F screws (after noting number of turns for each carb) This spring I re-installed the carbs and it started within half a crank of touching the key. Sounds great...but not quite. The sneeze was still there. And lifting the high idle lever can make it worse.
I looked in the manuals and the only 'link/sync' I can find is related to carburetor synchronization. Ok, I've done that before on many motorcycles - so that's in the plans (except that my Motion Pro sticks only have the 5mm adapters and my outboard uses 6mm). I'll get that remedied today.
But, my real question relates to the screws under the brass plugs. I hesitate to call them fuel mix or air mix because other posts from Rodbolt suggest these really only alter the amount of a prescribed A/F mix determined by various jets in the carb. Regardless, I can't find anything in the service manual to adjust these screws. Did I miss it? If so, what page is it? My manuals are LIT-18616-02-67 (62Y-28197-1F-11) and LIT-18616-02-68 (69W-28197-1F-1X.
How do I adjust these screws? thanks!
This past fall, during winterizing, the engine was 'sneezing' ever so slightly. Over the winter, I completely disassembled the carbs, cleaning them in a heated ultrasonic bath. That included removing the brass plugs and the underlying A/F screws (after noting number of turns for each carb) This spring I re-installed the carbs and it started within half a crank of touching the key. Sounds great...but not quite. The sneeze was still there. And lifting the high idle lever can make it worse.
I looked in the manuals and the only 'link/sync' I can find is related to carburetor synchronization. Ok, I've done that before on many motorcycles - so that's in the plans (except that my Motion Pro sticks only have the 5mm adapters and my outboard uses 6mm). I'll get that remedied today.
But, my real question relates to the screws under the brass plugs. I hesitate to call them fuel mix or air mix because other posts from Rodbolt suggest these really only alter the amount of a prescribed A/F mix determined by various jets in the carb. Regardless, I can't find anything in the service manual to adjust these screws. Did I miss it? If so, what page is it? My manuals are LIT-18616-02-67 (62Y-28197-1F-11) and LIT-18616-02-68 (69W-28197-1F-1X.
How do I adjust these screws? thanks!
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