Since you are a newbie, here is what I do. I have two 2GM20s. My primary is a Racor. I travel in the hot Caribbean
I replaced my Racor filters with 2 micron filters. Why use 10, when the surface area is so fantastically large and the little engines need so little? This way, I seldom work
on the secondary Yanmar filter. The threads are small and it is difficult to put it together without mishap, so skip a few rounds each time. You are discouraged from topping up this filter, and told to bleed it manually to fill it. Donít use the bleed screw as it is delicate also, with tiny threads. Loosen the outgoing fitting instead, and wait for the bubbles to disappear.
I cleaned my fuel tank
some years back and only jerry jug fuel to it now. I fill 3 cans, add biokill, wait a few days for a flat day, then pour the supernatant through into the tank, attempting to leave a litre or two in the can. The remainder is accumulated in another jerry jug, allowed to settle, and tipped in in a similar fashion on next fill up. I always find a tiny bit of water
and dirt at the bottom of the jug, always. You may never get a bad dose of fuel in the life of the boat
, but if you do, youíll have so much trouble that you will wish you chose this method.
Now the Racor. With clean fuel, a large surface area, low fuel use, and no water
, how often should you change it? Not very. Good news, you have a glass/plastic viewer to see how the fuel is doing. Whenever you do get to it, shut off the supply, drain the housing into an appropriate container, remove the top and filter. If you are annoyed that the glass and vanes are getting dirty, there is no need to disassemble. Take a hardware
syringe (West Marine
kit?), take up the discarded fuel from the container, and spray it down into the empty housing, allowing it to continue to drain. Repeat until it looks good, and re-assemble. This housing, you ARE encouraged to top up with clean fuel. You probably have some, if you are jerry jugging fuel like I do.