I had a problem I think with bug last year. It wasn't blocking the filter but actually blocking the pipe prior to the filter.

I dosed the tank and blew the line through. And I haven't been using the boat much as I had a bad leg but the few little trips I did were all fine.

Went to cowes yesterday from southampton. It was a bit bumpy ( gusting 45 knots wind - top end of F8) so the tank got a good agitation - and the engine went again.

Switched to the other tank and all was well thankfully as I didn't fancy berthing on 1 engine in that wind.

Filter is clear.

So what does the panel think? Is it bug? Suggested fixes either way please. There is no drain off on the bottom of the tank nor is there an inspection hatch.