Bleed hoses back to tank ?

[TODD_TN]

I'm building a carb'ed 2.5 Mercury and I ran across a thread that mentioned . . .

"Also on the bleeds that connect from the front 1/2 back to the rear of the block, you
will find the motor to run crisper and idle cleaner if you block the rear block end and
run the front 1/2 end back to the fuel tank"

Anyone ever do this ?

[frank jackson]

I have on a omc the back half had no place for the lines . I made a manifold to collect it and ran the line to a filter and returned it to the tank ...

[powerabout]

The hoses are only to make it run better at idle.

[Markus]

As long as you don't reroute the line that lubes the upper crank bearing, you will be fine.

I doubt that you will notice any difference, though...