I started out buying a couple of the Yamaha "can" style spin-on separators, but decided last second to use the Racor S3213 with clear bowl on bottom. It's only for an 1801 with outboard use, but still in an enclosed location. I first searched the Boat Builder's Handbook 33 CFR publication (revised Nov. 2003) Subpart "J" (fuel systems), but could not find anything about filters in enclosed locations. The only info I could find was 18.570 reffering to the mounting of filters. There was also info on fuel-hose clamps, allowable leak-rate, etc. At any rate, I can change it back to the can style at any time. Being a new owner, it was important for me to know how much condensation to expect from a cold aluminum tank with ethanol gas. Once I determine an average condensation, then barring a bad batch of gas, I can go back to the solid can filters if determined to be against regulations.
My question is, do I have to fill the filter with fuel first (like the instruction recommend) prior to spinning on a new Racor, or can I get by with the primer bulb only, on a new & empty filter?