2009 yamaha F40 TLR question

[arny]

Another possibility is the ecu,that can actually make problems on certain rpm.
Had the same problem on a F40,with symphtomes like clogged carburators.Same behavior after cleaning 2 times,idle and ran fine to aprox 2500rpm-above would stall.If i could get it over 2500/2800 rpm it ran fine at higher speed. ecu was the "sinner" of problems,easy to replace-try to borrow one to test.

[preynoso]

Hey Guys, I’m having the exact same issues with a F40TLRB bogging down and we have cleaned the carburetors 4 times and always have the same issue. I bought the motor used but could it be the ECU that’s the culprit? What’s the part number for that?

[preynoso]

Another possibility is the ecu,that can actually make problems on certain rpm.
Had the same problem on a F40,with symphtomes like clogged carburators.Same behavior after cleaning 2 times,idle and ran fine to aprox 2500rpm-above would stall.If i could get it over 2500/2800 rpm it ran fine at higher speed. ecu was the "sinner" of problems,easy to replace-try to borrow one to test.

Any idea what the part number for the ECU is?

[TownsendsFJR1300]

Any idea what the part number for the ECU is?

Part #1: https://www.boats.net/catalog/yamaha...3/electrical-1