--- In [email protected], "Phil Rushton" <rush...@...> wrote: > > > ----- Original Message ----- > From: "ap4098" <brook...@...> > To: <[email protected]> > Sent: Saturday, February 27, 2010 9:37 AM > Subject: [canals-list] Re: Heron 57' question > > > > > > > > Snip all > > > > Just a reminder for anyone marking a dipstick. > > > > The fuel pickup pipe should be above the bottom of the tank to allow water > > to collect below the pickup and not enter the system. Personally I would > > always have it about 2 inches above the bottom but there is no way we can > > easily find out without running the tank dry or draining it - both rather > > troublesome. > > > > So please make a mark 4 inches above the bottom of the tank and treat that > > mark as absolutely empty. That way you should not get any engines cutting > > out at inconvenient times. > > > > While on this subject please, if you are not using a fuel additive or have > > done so already, have a go at draining the water from the bottom of the > > fuel tank. In most narrowboats something like a hand or drill pump with a > > long pipe on it to reach into the back corner of the tank will do the job. > > > > Tony Brooks > > Has anyone here fitted what I think is called a *polishing* system? > It sounds a great solution to ensure a really clean fuel tank. > > Phil >
If you have a sedimentor and agglommerator on a modern "self bleeding" engine you almost have that already because of the constant flow back to the tank of fuel cleaned in those units. However I suspect that the true fuel polishing equipment is based on a truck that comes to super-yachts and cleans the flue with filters etc. that can trap the bug. If you tried that with an on-board system either the filters would have to be very large or they would need changing frequently. Also unless the units can draw the fuel right form the bottom of the tank, not from the pick up pipe, I do no see how they can clean the sediment that must collect in the bottom of the tank. As far as I am concerned on typical inland craft it is far more effective to use an additive and then either drain the sediment every few month if the tank is so equipped or (as on a narrowboat) have a "vacuum" out every couple of years with a pipe on the end of a pump that gets to the lowest points in the tank. Tony Brooks
