How to change fuel filters

Posted by William A. Cormack (wacormack@…>)

I just finished changing my fuel filters and bleeding the engine for the first time on my F-36 with Yanmar 3GM30F engine. With the help of some of you and others I got the job done but not without some foul language so I thought I’d share the details with you all. One thing I did do right from the beginning was start the engine before opening any fuel lines or filters, therefore I knew that air was the problem not something else. I was glad I learned all this while still on the hard, not bobbing around in the bay.






How to change fuel filters

CLOSE PETCOCK IN FUEL LINE

DRAIN PRIMARY FILTER

REMOVE/REPLACE FILTER CARTRIDGE


REMOVE AND REPLACE ENGINE FILTER

From here on is standard bleeding of the engine

OPEN VENT ON PRIMARY FILTER

UNSCREW PUMP ON PRIMARY FILTER

OPEN PETCOCK IN FUEL LINE

PUMP PRIMARY UNTIL FUEL COMES OUT VENT

CLOSE VENT AND SCREW DOWN PUMP

OPEN VENT PLUG ON TOP OF ENGINE FILTER - 10MM


OPERATE FUEL PUMP LEVER UNTIL FUEL COMES OUT
FUEL PUMP LEVER ONLY MOVES AND INCH OR SO AND ONLY PUMPS AT THE END OF THE STROKE

OPEN VENT ON FUEL INJECTOR - 10MM

OPERATE FUEL PUMP LEVER UNTIL FUEL COMES OUT

S/B OK TO START NOW (if you didn’t run out of fuel or fail any of the prior steps and tried to start)

IF NOT LOOSEN INJECTORS


CLOSE SEACOCK TO PREVENT WATERLOCK
USE REMOTE START

CRANK WITH COMPRESSION OFF UNTIL FUEL SPURTS FROM INJECTORS

TIGHTEN INJECTORS

START UP


MAY HAVE TO REPEAT THE WHOLE BLEEDING IF IT WILL NOT START
OPEN SEACOCK

Bill
_________________________________________________William A. Cormack, CPAPrincipal and Chief Financial OfficerWhelan Associates, LLC, a Corporate Real Estate Service Firm100 Faunce Corner Executive Center, Suite 150500 Faunce Corner RoadNorth Dartmouth, MA 02747Voice: 508-984-4100, Fax: 508-984-4101, Cell 508-254-5828MailTo:wacormack@…