The general theory in the past has been that we needed 2 separate gas tanks so that if we got bad gass (e.g. contaminated with water), we could switch from one tank to the other. This assumes, I guess, that only one tank would get the bad gas, which would certainly not always be the case.
This is probably a legitimate concern when fueling up in SE Alaska at villages or the like, but how often do we run into this in normal domestic use?
With the 10 micron fuel filters with visible bowls and drains that are used on today's EFI engines, it would seem that this two tank scheme may not always be necessary, depending on where you typically fuel up.
I'm thinking that if a simple inverted "Y" and a shut-off valve above were substituted for the off-1-2 valve usually installed in the boats, that there would be two advantages gained:
1. The weight loading port and starboard would be equalized by the liquid seeking a common level, eliminating the shift in weight / balance as one tank at a time was emptied. The weight shift is a bothersome effect to some of us.
2. The need to shift the switch from 1 to 2 (or vis-a-vis) when approaching the end of one tank would also be eliminated, gettng rid of one more bothersome detail.
Can you folks think of reasons why this wouldn't work under the conditions above where gas quality is almost never an issue? (I've had none in 9 years with the C-Dory.)
Joe.
This is probably a legitimate concern when fueling up in SE Alaska at villages or the like, but how often do we run into this in normal domestic use?
With the 10 micron fuel filters with visible bowls and drains that are used on today's EFI engines, it would seem that this two tank scheme may not always be necessary, depending on where you typically fuel up.
I'm thinking that if a simple inverted "Y" and a shut-off valve above were substituted for the off-1-2 valve usually installed in the boats, that there would be two advantages gained:
1. The weight loading port and starboard would be equalized by the liquid seeking a common level, eliminating the shift in weight / balance as one tank at a time was emptied. The weight shift is a bothersome effect to some of us.
2. The need to shift the switch from 1 to 2 (or vis-a-vis) when approaching the end of one tank would also be eliminated, gettng rid of one more bothersome detail.
Can you folks think of reasons why this wouldn't work under the conditions above where gas quality is almost never an issue? (I've had none in 9 years with the C-Dory.)
Joe.
