Yamaha Power Loss Then Stall

[Willwors]

Took Dad's Dory out today. Fitted with 2 Yamaha 25 2 Stroke Outboards. Both engines started first time but one was running a bit rough and stalling on idle from cold, fair enough, boat hasn't been used for a month. Both engines ran well for the trip, on the way back in a weird thing happened a couple of times. When throttling down from about 4000 - 2500 revs the engine that had a bit of a rough idle would lose all power then stall. First time it happened, it restarted first time. Second time it happened, it took at least 15 turns and lots of choke.

Any ideas?

[Jizm]

Sounds fuel related, did you check the supply and filter etc?

[Tim M]

Blocked idle jet maybe?

[Nos4r2]

Are you running seperate tanks for each motor-if so it could be water in one tank.

[Willwors]

yes it has seperate tanks for each engine. guess that could be the problem. am fairly ignorant with engines so problem will prob be sorted when it gets its end of season sevice.