Yamaha 30 hp runs intermittently after winter

[redbeard]

My 2000 Yamaha 30 outboard starts fine when cold, runs great for 5 minutes, then quits intermittently.

Restart is difficult, even after cooling for awhile.. if I can restart it, playing with the choke +/- seems to keep it running a bit longer, then it dies. It
doesn't rev above idle, and lasts from 5-30 seconds before quitting.

I bought the engine at the end of last season after it was supposed to be tuned and winterized. The previous owner claimed it was working fine.

I changed the fuel primer bulb/line, it all looks tight, and put in fresh gas..
any suggestions??

Thanks Tom

[99yam40]

break out the manual and tools and start testing.
Compression, spark, timing, If all that is good then start on the fuel side.
fuel pressure /vacuum.

Did you drain the tank, lines and carbs of old fuel before putting in fresh?

Probably time to pull carbs and go through them