ThumperNZ
Well Known Member
I have fired up the '61 348 Tri Power I built for Mark & Annie's Bubbletop.
It fired into life easily but had a low speed stumble which smoothed out as revs increased.
It seems to be the middle carburetor at fault, if I put my hand over the carb throat when running, it smooths out, so I disassembled the carb to see what could be wrong, all I found was suspected air bleed plugged.
These carbs were built by a TriPower specialist in Pennsylvania. What I saw in the carbs was good workmanship, so I suspect the plugging has happened during the waiting time since they arrived early this year.
I have tested the vacuum, and have 18" and no detectable leaks.
Also of note, is the need to have maximum idle speed to enable it to run.
https://www.facebook.com/rod.allen.560/videos/1092076734214342/
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