(clean) table where you can work and not loose the tiny parts, open it up,
take the jets out (need tiny screwdriver) blow them out (need compressed air
gun) as well as the passages. Be careful though and pay close attention when
you take the carb apart, lots of springs and tiny parts.
When it's all together, make sure you install an aftermarket (larger) fuel
filter.
Good luck,
Felix K
----- Original Message -----
From: "Roger L." <[EMAIL PROTECTED]>
>
> Our Yamaha 9.9 four stroke OB started doing a weird behavior
> this year. When it is running in gear at low RPM it will
> sometimes just start running weakly and then die. Changing from
> forward to reverse gear at low RPM at first seems to work fine,
> but will almost guarantee that the motor will go weak and die in
> the next 5 to 15 seconds or so. This tends to happen when I'm
> running slow anyway.....like when approaching the dock....or the
> trailer. Lots of excitement then. When it does this, the motor
> sounds like it is just running out of gas. This perception is
> reinforced because if I pump the bulb, it will start right up
> again and run fine for awhile.
>
> At anything over an idle it will run fine for miles across the
> lake. I don't believe the problem is in the idle passages or
> idle carburation, because when it isn't in gear the motor idles
> idle nicely for several minutes at least -..... though sometimes
> it will slow down and die... Other times not...
>
> Any ideas?
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