I have a Polaris jetboat with a optimax 250hp engine, after running
fine for 1/2 hrs. The boat fells as if its running out of fuel, the
engine surges and will not go past 10 knots. I've checked all fuel
lines and filters...ok. I just bought the boat it has 30 hrs and has
always had this problem. Does anyone have any ideals?

Sounds like a major problem on a boat that has only 30 hrs on the engine.
Does this happen every time you go out, or just the last time? I know you
said it always had this problem, but for all I know you only took the boat
out once. Anyway, check for crap wound around the impeller.

--Mike

wrote in message
oups.com...
I have a Polaris jetboat with a optimax 250hp engine, after running
fine for 1/2 hrs. The boat fells as if its running out of fuel, the
engine surges and will not go past 10 knots. I've checked all fuel
lines and filters...ok. I just bought the boat it has 30 hrs and has
always had this problem. Does anyone have any ideals?

On May 31, 9:00 pm, "Mike" wrote:
Sounds like a major problem on a boat that has only 30 hrs on the engine.
Does this happen every time you go out, or just the last time? I know you
said it always had this problem, but for all I know you only took the boat
out once. Anyway, check for crap wound around the impeller.

--Mike

wrote in message

oups.com...



I have a Polaris jetboat with a optimax 250hp engine, after running
fine for 1/2 hrs. The boat fells as if its running out of fuel, the
engine surges and will not go past 10 knots. I've checked all fuel
lines and filters...ok. I just bought the boat it has 30 hrs and has
always had this problem. Does anyone have any ideals?- Hide quoted text -

- Show quoted text -

Mike ...the problems happen everytime I've had it out. The impeller
is "clean" runs fine and wide open for 1/2 hr then just falls
flat...all most like a vapor lock...which it is not because running
fine for the 1/2 hr.

Check the vent system for the fuel tank.
JR

wrote:
I have a Polaris jetboat with a optimax 250hp engine, after running
fine for 1/2 hrs. The boat fells as if its running out of fuel, the
engine surges and will not go past 10 knots. I've checked all fuel
lines and filters...ok. I just bought the boat it has 30 hrs and has
always had this problem. Does anyone have any ideals?



--
--------------------------------------------------------------
Home Page: http://www.seanet.com/~jasonrnorth

I gotta agree with JR, it sounds like fuel then. Proper tank venting is a
good place to start. Is this engine EFI or carb?

--Mike

wrote in message
ups.com...
On May 31, 9:00 pm, "Mike" wrote:
Sounds like a major problem on a boat that has only 30 hrs on the engine.
Does this happen every time you go out, or just the last time? I know you
said it always had this problem, but for all I know you only took the
boat
out once. Anyway, check for crap wound around the impeller.

--Mike

wrote in message

oups.com...



I have a Polaris jetboat with a optimax 250hp engine, after running
fine for 1/2 hrs. The boat fells as if its running out of fuel, the
engine surges and will not go past 10 knots. I've checked all fuel
lines and filters...ok. I just bought the boat it has 30 hrs and has
always had this problem. Does anyone have any ideals?- Hide quoted
text -

- Show quoted text -

Mike ...the problems happen everytime I've had it out. The impeller
is "clean" runs fine and wide open for 1/2 hr then just falls
flat...all most like a vapor lock...which it is not because running
fine for the 1/2 hr.

Sounds like my Bombardier Jetboat from
1997 with vapor lock, leave the cap open
or slightly open to allow a little bit
of air in and see if it does it again.

Maybe a piece of dirt cutting it off but
then would it still run?