CJD said:
Here's a question...for those using the extra fuel filter at the carbs, how often do you find it clogged? Just curious to know how efficient the bowl and screen filter is.
I ran for many, many years with the usual amount of rust in the tank and no filter at all. My opinion, properly installed, the sediment bowl & screen do a pretty good job. Here's a shot of the sediment bowl after probably 3 years (about 30,000 miles) of not being cleaned (plus another 3 or 4 years of sitting after it got wrecked):
But, when I moved the carbs from the wreck to the current TR3, I found some very fine "mud" inside the lower jet bearing. So I installed a small paper element filter in the soft line just before the front carb. That was in 2009 and although the paper is turning a bit dark, I haven't had to change it yet.
You may have more trouble in more humid climates, though. Any trace of water that makes it to the paper will cause it to swell and close up. The usual advice is to change the filter every year.
Something to watch out for, on the filters with the glass tube and screen inside. Some of them use plastic end pieces that can break and spill fuel all over the place. After seeing it happen on a buddy's TR6, I wouldn't use the ones with plastic end pieces. The metal ones should be OK, although I suspect that the screen will pass larger chunks of dirt than a paper element filter will.