2007 25 hp Yamaha 4-Stroke Start Issues

Joined
Jul 10, 2019
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1
Model: F25MLHF

Use and Maintenance:
Located in Nova Scotia, Canada. The outboard is used about once every week or two from April through October. It is not winterized because it is used about once every month or two during winter. It is professionally serviced each autumn. They change the gear oil, engine oil and filter, and every two years they change the impeller and spark plugs. The carburetor has been cleaned using an ultrasonic cleaner in 2018. It is stored inside all year, and looks almost brand new inside and out. Previous to me, the owners were a volunteer fire department, who rarely used it.

Issue:
The outboard typically starts well when cold and soon after turning off. To start the motor, I open the vent on the gas tank, pump the bulb on the line going from the tank to the outboard, put the throttle at start and pull the cord. The issue is when it has been running then is turned off for roughly 30 minutes to an hour. It is then much harder to start, requiring multiple pulls of the cord and more throttle, to the point where it revs high once started. When pulling the cord while it hasn't yet started, there is a smell of gas, perhaps like it is flooding.

Thanks.
 
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