Yamaha VMAX 175 bogging issue

[Bassgirl]

Hi all, I am trying to help out a friend.

He has just bought a 2000 VMAX 175 on a 2000 Triton ski and fish boat. I know it has carbs. It starts fine, gets on plane without a problem but when running at high speeds it starts to cut out. It feels just like as if you would be driving a car and feathering the gas pedal.

Any ideas on what it could be?

Thanks
BG

[99yam40]

Sounds like starving for fuel. Running lean can eat pistons so be careful

Check fuel supply pressure with gauges
Pull and clean filters

[DMSOUTH]

Sounds like O2 sensor needs cleaning... also check draw tube

[rodbolt]

post the model number
its either a V175 carbed,last made in 2000 or a VZ175 first run was 2001.

[Bassgirl]

post the model number
its either a V175 carbed,last made in 2000 or a VZ175 first run was 2001.

Thanks all for your replies.

I don't have the model number, but it is a 2000 175 with carbs. I saw them.

I will relay the info. Thanks again.

[rodbolt]

what your describing is a classic fuel starveation.
if it has carbs I would test compression,test spark then replace both fuel pumps and clean out the carbs.
carbed models have no O2 sensors.
if its a VZ model you will need some filter maint and the VZ model does have an O2 sensor but its not used for fuel corrections above about 1500 RPM.
remember there is a world of difference between a VZ175 and a V175.
about the only thing common is the silver blue paint.