Yanmar 1GM leaking fuel - is pipe attached correctly?

[LiftyK]

While checking the oil on my Yanmar 1GM10, I noticed a lot of white power on the engine where the fuel comes in. I brushed the powder away and am now wondering where to investigate first. The photo shows the site before I brushed away the powder. I’ve not changed anything in this area in a good while.

One thing that does seem odd is that the clearish fuel pipe on the right, on the exit side of the pump, is not secured with a clip as far as I can see. Is this normal please?

I tried to reach the end-on nut (banjo bolt” perhaps?) at the far side but will have to move a load of stuff and approach the engine from the rear. That’s my next task.

Thanks for all helpful suggestions.

 

[LiftyK]

As I dig in further I see a t piece in the cooling water inlet pipe sits right above the offending area. I’m now thinking I have a salt water leak above the pump. Diesel wouldn’t dry out to leave a white powder residue. That will be salt. I’m on the case.

 

[Tranona]

Yes, dripping seawater. Common on 1GMs. Take it all apart and clean it up plus of course deal with the coolant pipe. You will probably find that and the T piece into the blog partially blocked. The hose is normal. The fitting is crimped onto the hose and does not need a clip. Might be worth replacing that. You can get one made up by your local Hydraulics shop such as Hyphose or Pirtek.

 

[rotrax]

Watch the oil pipe under the front of the engine too. Not unknown for those to rust through if the seawater pump shaft leaks a bit.

 

[LiftyK]

Thank you both. I will disassemble the T piece and have a good look inside and cleanse if necessary. Great advice Tranona.

Rotrax - also excellent advice. That said, I now have sintered rust-proof pipes which are additionally painted for almost bombproof protection against rusting through. The pipes came from eBay at a lower price than the regular Yanmar pipes. All this happened after the previous pipes did indeed shed all the engine oil after a water pump leak took longer than expected to repair. Fortunately, and much to my surprise, I managed to replace the pipes and get going again very quickly.