Yamaha 40ESD 1990

by Hunter
(Oregon)

Engine starts easily, runs for about 10-15 seconds, coughs and dies. Have rebuilt carburetors, installed new fuel pump and filter. Running the motor under load on the river it runs flawlessly at all speeds. Carburetor set to mfg specs and fine tuned to achieve targeted idle speed and smooth operation, when it is idling (before firing).

Comments for Yamaha 40ESD 1990

Average Rating starstarstarstarstar

Click here to add your own comments

Jul 27, 2021
Rating
starstarstarstarstar
loss of power
by: Dolpterry

Could be the primer bulb or gas connector going into the engine

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Yamaha Outboard Forum.