yamaha hpdi 200 problems

[sharkstew]

hello,<br />i have a 2001 yami hpdi 200 with a problem i can not find. the motor will run great in the bay (@ no wake) and 5-10 minutes into the ocean it will bog down but not completly stall out @ all RPM's. i have taken it to my local dealer and he put it on the dyno and everything came back A-OK. if i squeaze the bulb the motor will run fine. the motor has about 40 hours on it and has been well taken care of. please help.

 

[Panther]

Re: yamaha hpdi 200 problems

it isnt something silly like a blocked breather on the tank is it causing a vacume in the tank then not allowing the fuel to get to the engine ?? slacken fuel cap and try again

 

[BRIAN03]

Re: yamaha hpdi 200 problems

One run a remote tank to identify if its the engine or boat. Next hook up a vacuum gauge in the fuel line to see vacuum pull on fuel system. Sound like a restriction in the fuel system. Pickup or check valve.

 

[sharkstew]

Re: yamaha hpdi 200 problems

thank you both.<br />i am hoping it's only a fuel flow problem. i'm having the boat sea trialed friday. keeping my fingers crossed we find it.

 

[rodbolt]

Re: yamaha hpdi 200 problems

hello<br /> do a fuel system vacum test and if the low pressure mechanical pumps have white plastic diaphrams replace them. there were some problems with those pumps.<br /> sounds like the vapor seperator is running out of gas. good luck and keep posting