I have a 2000 Yamaha 9.9 4-stroke Canadian model that I use as a kicker. It has always been difficult to start, unless I put a thumb over the air intake. Having to take the cowling off to start the kicker is not what I'd like to do in the case of having to use the kicker. I've had the carburetor overhauled professionally and the enrichment gizmo replaced with no change. I recently adjusted the carburetor (the US model appears not to be adjustable) with no change in the starting problem. I'd appreciate hearing from anyone who's been able to overcome an issue like this with this engine. Thanks.Bill
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