Bowkill1 Posted April 23, 2018 Report Share Posted April 23, 2018 Anyone replace the engine mounted fuel filter on a Raptor engine? I can't seem to find a part # anywhere... It says to change annually but does not provide any info. Quote Link to comment Share on other sites More sharing options...
EngineNut Posted April 23, 2018 Report Share Posted April 23, 2018 You can get the filter at NAPA P/N 3481. The most important thing to do is to relieve the fuel pressure in the system before removing the filter. Go to the fuse box on the engine and remove the cover and the two fuel pump fuses or the fuel pump relay. With the fuses or relay removed, crank the engine like you were trying to start it. The engine will crank for 8-10 seconds then stop. The engine may try to run briefly but not long enough to do any damage. leave the fuses or relay out till after re-assembly. The filter is not easy to get at but you will need to put a wrench on the filter nut then loosen and remove the fuel lines on both ends of the filter. There will be some residual fuel in the filter so have an absorbent towel to catch any drippings. With the fuel lines disconnected. remove the filter from the bracket. When you reinstall the new filter, make sure the directional arrow is pointing up. Put the filter in the bracket but don't tighten yet. Install the inlet and outlet fuel lines ... leave them finger tight till you have both installed. Once both lines are installed finger tight, use the two wrench method to tighten. The lines have O-rings so be sure the lines are snug ... but you don't have to over tighten. Tighten the filter in the bracket. Make sure the key switch is off and reinstall the fuel pump fuses or relay you removed earlier. Install the cover on the fuse block. Have one person turn the key switch on to activate while the other checks for leaks. Repair leaks as needed. Repeat the key-up process two or three times to make sure fuel is supplied to the system and there are no leaks. garys929, Mucker626, Hondatech117 and 1 other 4 Quote Link to comment Share on other sites More sharing options...
Mucker626 Posted April 23, 2018 Report Share Posted April 23, 2018 That is a lot of good info...and quite the process to change a filter! The Donfather 1 Quote Link to comment Share on other sites More sharing options...
Hondatech117 Posted April 23, 2018 Report Share Posted April 23, 2018 You can get the filter at NAPA P/N 3481. The most important thing to do is to relieve the fuel pressure in the system before removing the filter. Go to the fuse box on the engine and remove the cover and the two fuel pump fuses or the fuel pump relay. With the fuses or relay removed, crank the engine like you were trying to start it. The engine will crank for 8-10 seconds then stop. The engine may try to run briefly but not long enough to do any damage. leave the fuses or relay out till after re-assembly. The filter is not easy to get at but you will need to put a wrench on the filter nut then loosen and remove the fuel lines on both ends of the filter. There will be some residual fuel in the filter so have an absorbent towel to catch any drippings. With the fuel lines disconnected. remove the filter from the bracket. When you reinstall the new filter, make sure the directional arrow is pointing up. Put the filter in the bracket but don't tighten yet. Install the inlet and outlet fuel lines ... leave them finger tight till you have both installed. Once both lines are installed finger tight, use the two wrench method to tighten. The lines have O-rings so be sure the lines are snug ... but you don't have to over tighten. Tighten the filter in the bracket. Make sure the key switch is off and reinstall the fuel pump fuses or relay you removed earlier. Install the cover on the fuse block. Have one person turn the key switch on to activate while the other checks for leaks. Repair leaks as needed. Repeat the key-up process two or three times to make sure fuel is supplied to the system and there are no leaks. It's nice to see you still lurk around, thanks for all the helpful info! Quote Link to comment Share on other sites More sharing options...
bloodiestcadaver Posted April 23, 2018 Report Share Posted April 23, 2018 keeping slack in the bracket is key to not making a rookie move and crossthreading something that is not easy to replace, like fuel lines Hondatech117 1 Quote Link to comment Share on other sites More sharing options...
Bowkill1 Posted April 24, 2018 Author Report Share Posted April 24, 2018 keeping slack in the bracket is key to not making a rookie move and crossthreading something that is not easy to replace, like fuel lines Perfect and thanks for the info. I have read all manuals for other boats as well and none mention the engine mounted filter, only that the in tank filter is rated as a lifetime filter... The Indmar manual says replacement at 300hrs or annually. Sounds like it may not be be necessary after 1 season 80hrs? Quote Link to comment Share on other sites More sharing options...
oldsmobiledriver Posted April 24, 2018 Report Share Posted April 24, 2018 Filters are way cheaper and easier to do now over replacing hard parts or being stranded on the water! Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
EngineNut Posted April 24, 2018 Report Share Posted April 24, 2018 The filter on the engine is actually the second filter in the system so it is filtering already filtered fuel so changing it at 80 hours is probably not necessary. I would wait till the time was closer to 300 hours. Hondatech117 1 Quote Link to comment Share on other sites More sharing options...
Bowkill1 Posted April 24, 2018 Author Report Share Posted April 24, 2018 I agree and plan to do it next season. Thanks again for the 411. The filter on the engine is actually the second filter in the system so it is filtering already filtered fuel so changing it at 80 hours is probably not necessary. I would wait till the time was closer to 300 hours. Quote Link to comment Share on other sites More sharing options...
shadowrider Posted October 2, 2024 Report Share Posted October 2, 2024 TIPS for changing fuel filter? Quote Link to comment Share on other sites More sharing options...
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