Logo
FULL SITE MENU

225hp fuel usage

Don't know what your fuel pressure should be, but one of my Verado's were using more fuel than the other and that's what it was
 
What model 225's? Two strokes, four strokes, HPDI's, OX66's, carburetors, ?

On what device are you seeing fuel flow?
 
boscoe said:
What model 225's? Two strokes, four strokes, HPDI's, OX66's, carburetors, ?

On what device are you seeing fuel flow?
Click to expand...
4 strokes fuel injected 1200hrs 2003 models

fuel flow senses one for each motor reporting to Garmen plot charter motoring gph, fuel used per engine and total, range, and mile per gal
 
I would suspect a fuel flow sensor is at fault. One or both.

See what the individual fuel flow is for each motor at WOT RPM. I would expect somewhere about 20 gallons or so per hour.

Maybe do the test at cruise RPM and see if one sensor disagrees with the other.
 
boscoe said:
I would suspect a fuel flow sensor is at fault. One or both.

See what the individual fuel flow is for each motor at WOT RPM. I would expect somewhere about 20 gallons or so per hour.

Maybe do the test at cruise RPM and see if one sensor disagrees with the other.
Click to expand...
both motors with in 2 tenths a gal at cruise. had Yamaha gauge set did not believe it so i added Garmin fuel sensor same reading, The reading are correct at fill up gal used is with in 2 gal while motoring at consent rpm for 1/2 hour fuel used is 1/2 my gph. something is telling my cpu to run rich that is the general opinion but what
 
I am confused. Not unusual.

So you are saying that per your Yamaha fuel management meter the motors WERE burning the same amount of fuel and per the Garmin fuel sensors WERE burning the same amount of fuel but now they are both indicating widely different values. And both the Yamaha gauge and the Garmin display agree with the differing fuel flow amounts?

What does the fuel flow system now show for the fuel rates?
 
boscoe said:
I am confused. Not unusual.

So you are saying that per your Yamaha fuel management meter the motors WERE burning the same amount of fuel and per the Garmin fuel sensors WERE burning the same amount of fuel but now they are both indicating widely different values. And both the Yamaha gauge and the Garmin display agree with the differing fuel flow amounts?

What does the fuel flow system now show for the fuel rates?
Click to expand...
both set ups showed the same amount of fuel being used the issue is the motors are using more fuel than they should ex before 3500rpm/15gph now 3500rpm/23gph the question is why
 
William01 said:
Not sure how the Yamaha system works so my question may be moot. Is there a calibration routine?
Click to expand...
only on the senders, throttle position sensor(tells cpu where throttle position is and sends fuel to injectors), temperature sensor(tells cpu engine temperature is if indicating they are cold cpu will richen the fuel mixture) are the two that could cause it or the cpu could need to be reloaded
 
all is well it was the throttle position sensor on both motors where bad, the motors are now are using 14 gph total at 3500 rpm, it also increased my top end rpm from 5100 to 5600 with loaded boat One happy boater thanks everyone
 
Back
Top