The return hose to the Jerry Can is obviously important. It would be an own goal to allow the engine to draw red diesel and "return" half of it to the main tank.
That would defeat the purpose! The jerry can take off lids have a return pipe as well as a takeoff. Bit of a faff plumbing it temporarily.
The OP's Yanmar 3jh series engine will almost certainly have a return pipe.
I ran my Betamarine engine from a 20litre can of diesel as an emergency get me home measure when I had what turned out to be a blocked tank "up pipe" due to diesel bug.
As an idea it might appeal, but I think it would involve more plumbing than it is worth. You would also have to ensure the tank is fixed and seaworthy
Thanks. When I was in Peterhead on my round Britain the depth in the entrance to the marina was restricted as a result of severe winter storms. We were invited to berth at the harbour office of the professional harbour and invited up to the office by a very kind harbourmaster who told us the story of the fishing and the offshore industries at Peterhead
It has indeed
Remains of red diesel in a tank are traceable after several refills with white, I’m afraidAnother possibility for westhinder is to go the whole hog, and do similarly but using the/a main tank, as follows:
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Use red in his main tank (or one of them if he has several), then on his return aim to stop somewhere on East Coast with white diesel available, and there sell/give away (could be pre-arranged via this forum) the remaining red (might not be that much if he'd previously largely run down his stock of red), having previously armed himself with cheap fuel transfer pump, hose and jerry can. Then fill the empty tank with fresh white diesel for his return across to Belgium.
And Bob's your oom or oncle, as the case may be!
There is no easy get out of jail card. The fine is for having red, there is no question of declaring it. Traces of red in your tank are enough to be fined not on what is left in the tank, but on the whole capacity of the tank, in my case 200L, which means a minimum of €1000.
If you don't want to install a separate temporary tank to keep your main tank uncontaminated, that's fine, but be aware with the Iran war situation that later this year, if it doesn't improve soon, you may not be able to buy white diesel in cans from petrol stations. No-one knows at the moment, but so far there is no sign that it is getting better, and diesel supply looks like it's going to be a bigger problem than petrol in the UK. Diesel is also a more critical fuel being used for farming, fishing, trucking, emergency services and public transport, which will all get priority.
It's complicated, but basically the answer is no. The fine is for having it in your tank. This was decided when the UK was still in the EU. There are 2 EU directives. One says that fuel on which duty has not been paid must be marked and the other said that leisure craft must use duty paid fuel. The UK interpreted this as leisure boats can use marked fuel as long as they have paid the duty, and according to the letter of the 2 directives that was correct. However... the EU commission considered that the UK was in contravention of these directives and took the UK to court, and the UK lost, was fined, and told to resolve the situation. Then the UK left the EU, which resolved the situation in the UK, but the court ruling stands - EU leisure craft cannot use marked fuel regardless of whether duty has been paid. Non EU based craft can have marked fuel in their main tank only upon arrival as part of the temporary admission rules, but this does not apply to the OP.