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Diesel bug

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hmmmm, got a similar problem but only manifests after a hell beat that stirs up sediment.  Im going to nibble a hole in the SS tank, clean it in situ and then plan to glue an inspection port in using something diesel proof

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Flush and drain with fresh diesel as much as possible, get a good diesel bug additive and use it from now on, but the main bit:

Install a good glass bowl diesel water seperator (filter), and if having your engine running is mission critical, install 2 with valves so if one fouls up, you can switch to the other with the flick of 2 valves.

A good filter should be about $150, but all the fittings to put in 2 can add up quick. You may also want to be able to bleed your engine super quick and easy. I've installed an outboard motor fuel priming bulb. Cost about $15 and super quick to pump diesel through, 10x faster than the little engine fuel pump...

We've had the bug, it is a major pain in the arse. We pulled the tank out for a thorough clean. You will need to learn to live with it, hence the need for 2 filters (I think), the biocide, and as much flushing as possible.

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Drain and flush,install water trap/filters, as Fish Said outboard bulb works well,Buy fuel where there is big turn over and use a biocide and where possible leave tanks full.

Leave it and it will get in to your pump injectors etc

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My other tank can access the top. So like to cut for a inspection hatch.No mains power.Have 18v Ryobi grinder(but thats sounds a nono)Buy a Ryobi jigsaw?Are they good for cutting stainless?

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get or borrow a nibbler, failing that tin snips. Avoid filings, the SS is usually 1.2m or thereabouts so its easy to cut. You may need two holes if you have baffles. It a once in the life of the tank affair so I even thought just use some 5200 or whatever diesel proof goop to stick an SS patch on it. Obviously the best way is remove and weld but sometimes you have to make do.

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15 hours ago, harrytom said:

Tank should be removable in most cases as they do get pin holes now and again,really should remove and flush.

I'll agree with that. Developed pin holes in the fuel tank on my Cav 32. Had to remove the engine to get the fuel tank out. Had the same happen in my present boat, tank is in under saloon seat. 

Undo the hold down fixings and lift out. Couldn't be easier.

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25 minutes ago, chariot said:

I'll agree with that. Developed pin holes in the fuel tank on my Cav 32. Had to remove the engine to get the fuel tank out. Had the same happen in my present boat, tank is in under saloon seat. 

Undo the hold down fixings and lift out. Couldn't be easier.

No idea why designers/builders put tanks n things in unaccessable places,cav 26 fuel tank under rear of cockpit and could slide out via quarter berth same for water

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My boat always smelt slightly of diesel until l glassed over the ss tanks with flexible epoxy. Made them removable at same time. Hoping never to have to go back there....

where do you guys vent tank to? I went to under coaming  in cockpit. Need a a fitting though.

Live in fear of bug.

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