How to: troubleshoot your marine diesel fuel system - Yachting Monthly

The diesel inboard on your boat has stopped working. The electrics are all working okay, so it's likely to be the fuel system. Knowing how to trace the fuel system and troubleshoot it at each point is key. Rubicon 3's (www.rubicon3.co.uk) Bruce Jacobs shows Matthew Sheahan how to do it.
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[@TraderTips]

Hi good video - one thing that might be worth mentioning particularly if you are new to the boat or someone else has used the engine. Check the engine stop lever has not been left pulled out! Sometimes this cannot be seen if not adjacent to the start key.

[@sailingaphrodite4189]

It might be worth mentioning the return fuel system. You won't get very far on one can of fuel that is being returned to the main tank!

[@KarelBeelaertsvanBlokland]

Most common failures is Vacuum leaks! ... Make sure any connection is connected well... Even the non using taps on the Delphi pre-filter may leak ..... Use brass gasket rings and make sure the hose connections are tight

[@sabatieryves6536]

Perfect with subtitles .Thanks.

[@aeh1709]

the best vid on the subject i have seen. thank you so much

[@jacobfirst2365]

Awesome vid! Absolutely perfect. 🍻⛵

[@lotsimo]

very good explained, learned a lot....

[@sailingsilverwind]

Great video, I am working on my Volvo Penta MD11C, i got the diesel bug in it!

[@deankelly6882]

Very helpful iv just purchased a 36ft cruiser that's been standing since 2017 and I'm having trouble starting it but with your videos I should be able to get it started now thanks very helpful.

[@IrregularPineapples]

Did you get it started?

[@MrRugbylane]

Did you get it started yet ?

[@BillSikes.]

Did you ever get your engine started 🤔

[@BigMamba10000]

Did you get it started?!

[@kylek2794]

Good tip at the end !

[@matthowarth2971]

That's only bled part of the low pressure side of the system, there will still be air in the line between the secondary filter and the injector pump. You need to loosen the bleed on the pump and repeat the process using the lift pump lever. Then there will still be air in the high pressure side of the system, a lot of engines are self bleeding but if anyone here is genuinely stuck and their engine still isnt running you need to crack your injectors off and turn your engine over on the key until you see fuel coming out of each. (Do this one at a time, and be ready for the engine to possibly fire before you get to the last injector) Remember to shut your seacock off so you dont flood the engine with water and dont have it turning over for more than 10 seconds at a time so you dont fry your starter (let it cool off for a bit between turning). If your engine still isnt running then it's not a problem with air in the fuel.

[@billykarson5121]

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[@kaseelisha9155]

@Billy Karson Instablaster =)

[@billykarson5121]

@Kase Elisha I really appreciate your reply. I got to the site on google and I'm trying it out atm. Seems to take a while so I will get back to you later when my account password hopefully is recovered.

[@billykarson5121]

@Kase Elisha HOLY **** IT ACTUALLY WORKED! I just got access to my ig account within about 45 minutes of using the site. Just had to pay 15 bucks but for sure worth the money =) Thanks so much you really help me out!

[@kaseelisha9155]

@Billy Karson glad I could help :D

[@ColGadarby]

Very good !

[@trouveruneile9365]

Bonjour, merci pour vos vidéos sous titrees en français, elles sont simplement parfaites.

[@TATEXPRESSINC]

I love the video

[@marcoforte298]

Thanks !

[@hawaiidogs9277]

Ty sir

[@RelaxationMeditationMusicSpace]

Nice video thanks for the info💕 Not to mention the fuel and water Seperator in this video has a little black ring inside if there is water in there the black ring will float right?

[@lucasspaniard8430]

Emergency into a jerry can is great, but don’t forget to mention that the jerry can will have a much decreased range if your engine is set up with a fuel return. You would need to unhook the fuel return and place it in your jerry can as well to get proper fuel consumption.

[@enriquelorenzo5476]

If you don't connect the fuel return, the only thing that will happen is a greater consumption of diesel, right?

[@lucasspaniard8430]

@@enriquelorenzo5476 yes, as in it will cycle fuel from your Jerry can into your fuel tank. (cooling injector system) I meant to try this with my Yanmar to see what the hourly consumption increase is. I know if you feel your fuel tank after a few hours of operation, it will feel quite warm.

[@robertb7254]

With my 6 cylinder you have to bleed at each injector VS one central location….thanks for video

[@MrBluoct]

Any time frame when one believes the injectors are “gummed up” and the spray pattern compromised because the boat / motor had been stored for an extended amount of time ? And if cleaning injectors is ideal vs new I believe once the spray pattern is compromised, the injectors nozzle spray does not ... “self correct” with any type of fuel tank additives or magic potions ... Then trouble shooting the injector pump - how? Those two parts on my 2gm20?were the issue on an otherwise perfect little 900 hour motor

[@klausjensen9150]

I really want to know where they got that cutey little diesel test tank from ? I cant seem to find one anywhere .

[@saltybuster946]

Remember the Diesel return is still going to the main fuel tank

[@austingode]

And the injectors ? And the injector pump bleed screw ?

[@Jyock]

When opening the fuel separator to look for water contamination. Do you need to bleed that filter after draining some fuel from the bottom of the filter?

[@urbanimage]

Nothing on bleeding the injectors?

[@stevehartley621]

You mentioned electrics at the start but didn't cover it again after that.

[@andreasnielsen1982]

If the pre filter is empty on diesel. Do i just need to bleed or fill the second filter?

[@garethferguson4434]

When I pump the manual lift, nothing comes out of the bleed valve. Does this indicate the lift pump needs replacing or os something else going on?

[@gregpsimos5388]

Hello, i have trouble while starting the engine first time of the day in early morning while the weather is warm, the starter have power to turn the engine, with the 3 4 times wont start, but after next try start normally, i already check filters bleeding, but couldnt find a solution.

[@fernandog.1575]

Man, my sailboat’s engine got a bad leak. Damn. The water is a mess every time I start the boat. Any suggestions? I’d appreciate it.

[@TheJalipa]

👍

[@jovandragicevic4242]

Is this water separator filter type ok for nanni diesel 21 hp ?

[@tomwilliams8675]

👍👍👍👍👍👍

[@sailingalcanzar]

To bleed the fuel lines on my boat I just manually pump the lift pump until fuel flows out of the return fuel line.

[@justinschulze6654]

What do you do if there is water in the fuel

[@mattpage2834]

Hi - what is the Yanmar demo engine you're using?

[@generaldisarray3830]

What do you do if there is water in fuel filter

[@BillSikes.]

If it's in the water separator, just drain it off by loosening the screw underneath, if it's in the main filter you must replace it with a new one

[@somyrab]

So show the fuel coming out with bubbles.

[@lytwilliams]

Hi, what could be the issue if the secondary fuel pump is still not receiving fuel?

[@lytwilliams]

Sorry, fuel filter

[@BillSikes.]

​@@lytwilliams Probably an airlock further upstream, bleed all the unions starting from the highest working you way right down to the injectors

[@billythompson4585]

Y does my beta engine won't sto

[@superwag634]

Where did they find this accountant to bleed the system with a ring spanner? 🤣 get a proper tool which turns more than 1/16th of a turn

[@byoobyoobyoobyoobyoo9785]

Wot do you do with 18 month old diesel?

[@user-jw7cu5ff8y]

👍