hello

my yamaha 9.9 PS runs in coast problemles in max rpm.
as soon as i put in forward gear, it goes down to 1/3 rpm.

in backward gear is worse and it switches off.

any idea?

As I understand your description: The engine starts and idles in Neutral,
but when you put in Forward or Reverse the engine dies.
This sounds like a fuel problem. I assume you have an external fuel tank
with a primer bulb inline with the fuel line. If you squeeze the bulb when
you shift into gear, does the engine still die? Do you have another tank and
fuel line? Verify the quality of the gas/oil mixture in the tank; water or
dirt will make the engine run poorly. If the problem is not external to the
motor I would suspect the carb has a blockage.

"mohm senad" wrote in message
...
hello

my yamaha 9.9 PS runs in coast problemles in max rpm.
as soon as i put in forward gear, it goes down to 1/3 rpm.

in backward gear is worse and it switches off.

any idea?

On Sun, 23 May 2004 20:51:19 -0400, "John Wentworth"
wrote:

As I understand your description: The engine starts and idles in Neutral,
but when you put in Forward or Reverse the engine dies.
This sounds like a fuel problem. I assume you have an external fuel tank
with a primer bulb inline with the fuel line. If you squeeze the bulb when
you shift into gear, does the engine still die? Do you have another tank and
fuel line? Verify the quality of the gas/oil mixture in the tank; water or
dirt will make the engine run poorly. If the problem is not external to the
motor I would suspect the carb has a blockage.
it is not a problem of external tank.

what do you mean "the carb has a blockage"



"mohm senad" wrote in message
.. .
hello

my yamaha 9.9 PS runs in coast problemles in max rpm.
as soon as i put in forward gear, it goes down to 1/3 rpm.

in backward gear is worse and it switches off.

any idea?

If the carb jets are partially blocked the engine will not be able get
sufficient fuel to handle a load (turning the prop when shifted into gear).
Did you try squeezing the primer bulb when the engine dies? If squeezing the
bulb enables the engine to keep running you may want to look at the fuel
pump. Does the engine start easily and idle smoothly? Does putting the
choke partially "On" make the motor run better?


"mohm senad" wrote in message
...
On Sun, 23 May 2004 20:51:19 -0400, "John Wentworth"
wrote:

As I understand your description: The engine starts and idles in Neutral,
but when you put in Forward or Reverse the engine dies.
This sounds like a fuel problem. I assume you have an external fuel tank
with a primer bulb inline with the fuel line. If you squeeze the bulb
when
you shift into gear, does the engine still die? Do you have another tank
and
fuel line? Verify the quality of the gas/oil mixture in the tank; water
or
dirt will make the engine run poorly. If the problem is not external to
the
motor I would suspect the carb has a blockage.
it is not a problem of external tank.

what do you mean "the carb has a blockage"



"mohm senad" wrote in message
.. .
hello

my yamaha 9.9 PS runs in coast problemles in max rpm.
as soon as i put in forward gear, it goes down to 1/3 rpm.

in backward gear is worse and it switches off.

any idea?