Desert Whaler
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- Oct 28, 2020
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So I just did an annual 100 hr service on my little Yamaha.
Along with all the typical stuff, I replaced the low pressure fuel pump. (diaphragm type that runs off the cam).
It's recommended to replace at 500 hrs and I'm at 560 . . .so $160 for the pump, a $10-ring, 2 bolts, and I'm good.
But looking a little closer at the fuel system . . . trip out on this.
I run a Racor water seperating fuel filter between the tank, and the motor . . . . see below . . .
Then , unde the cowling is a small factory water separating fuel fuel filter (paper element type) with an alarm sensor that'll throw a buzzer if water gets in.
Then after that it goes into the low pressure fuel pump (the one I replaced), and after that it goes into ANOTHER in-line fine-screen fuel strainer which I replaced as well $26.
Then it goes into the VST (Vapor Separator Tank) where there is another 'pre-filter' before the high pressure fuel pump which sends fuel to each of the injectors.
Then I guess there is a small screen for each one of the injectors as well . . . . gawd.
So in all, there are 7 various types of factory fuel filters, screens, and elements under the cowling of that little motor . . . add in the Racor and it makes it an even 8 !!!
Other than the typical small amount of sediment in the bottom bowl of the old Racor, everything looked clean . . . . but Yamaha sure puts an emphasis on fuel filtration. Good Lord.
In all, not bad . . .around $500 in various parts, like plugs, thermostat, oil, gear lube, fuel pump, gaskets, o-rings, and a new fuel line and primer bulb, and I should be good for the season.
Probably saved that same amount in labor by doing it myself, and it lets me do a once over on everything to make sure everything is buttoned up, and a little peace of mind.
Along with all the typical stuff, I replaced the low pressure fuel pump. (diaphragm type that runs off the cam).
It's recommended to replace at 500 hrs and I'm at 560 . . .so $160 for the pump, a $10-ring, 2 bolts, and I'm good.
But looking a little closer at the fuel system . . . trip out on this.
I run a Racor water seperating fuel filter between the tank, and the motor . . . . see below . . .
Then , unde the cowling is a small factory water separating fuel fuel filter (paper element type) with an alarm sensor that'll throw a buzzer if water gets in.
Then after that it goes into the low pressure fuel pump (the one I replaced), and after that it goes into ANOTHER in-line fine-screen fuel strainer which I replaced as well $26.
Then it goes into the VST (Vapor Separator Tank) where there is another 'pre-filter' before the high pressure fuel pump which sends fuel to each of the injectors.
Then I guess there is a small screen for each one of the injectors as well . . . . gawd.
So in all, there are 7 various types of factory fuel filters, screens, and elements under the cowling of that little motor . . . add in the Racor and it makes it an even 8 !!!
Other than the typical small amount of sediment in the bottom bowl of the old Racor, everything looked clean . . . . but Yamaha sure puts an emphasis on fuel filtration. Good Lord.
In all, not bad . . .around $500 in various parts, like plugs, thermostat, oil, gear lube, fuel pump, gaskets, o-rings, and a new fuel line and primer bulb, and I should be good for the season.
Probably saved that same amount in labor by doing it myself, and it lets me do a once over on everything to make sure everything is buttoned up, and a little peace of mind.
