Replace Fuel filters in Yanmar 3GM30F engine

[Syversens]

Hello all, I have a Yanmar 3GM30F and like to get more familiar with it. last weekend I changed the oil, my first time, and it went well. I'd also like to do the fuel filters but the guy helping me was not familiar with diesels and didnt know how to get the air out. Does anyone have an engine like this and can explain how they do it ? I read the manual but the pictures doesnt match and I can't figure out how to start the engine and same time open/close air vents... anyone with hands on experience how they do it would be greatly appreciated.Edit: I realize there are many posts about fuel filter but there seem to be many variations, I'm hoping some might have my engine and filter: Racor 110 and have simple instructions )thanks !Gaute

 

[Chris]

Which filter...primary or secondary?

I have replaced the primary (under the floor), but never the secondary (next to the engine). The primary was not hard, but bleeding the line was not fun. The secondary unscrews. I saw a friend of mine cut some pliers so the handles were short. Then they unscrewed the filter. I have never done this....

 

[Syversens]

I want to do both

Hey Chris, I'd like to do both at the same time thinking that would mean only one bleeding on the line.... I found some posts here but they all describe different ways of doing it. Did you use the primer next to the secondary filter (on pictures looks like a small lever).Also does anyone know what the black handle next to the battery switches are ? It looks like a pump for priming and it has a gas symbol on it.... might be only on yanmar Beneteaus but the manual doesnt say.Gaute

 

[catwithhat]

Fuel Switch Off

On my boat (343) its a fuel switch off

 

[chris]

I used the small lever

I did use the small lever which is hard (for me) to reach. It is on the left side of the engine I think just behind the oil dip stick. Took a long time to bleed.

 

[Deadhead]

Small lever on Fuel Pump

Change the filter on the engine and hand tighten the ring holding the cup in place. Open the bleeder screw on top o the filter housing & pump the lever on the back of the fuel pump until all air is removed.Fabricate a container to catch the fuel that sputters out of the housing. Make a cut half-way across a 2 liter soda bottle about 3" up from the bottom and then up vetically on each side for another 6" or so. Finish by cutting off the top of the bottle. Slide the vertical 1/2 round side behind the filter so the fuel pumps into the container and runs down into the reservoir on the bottom.The primary filter must be bled separately. Do it first.