Billy W's got the same problem with his '59 Viking 60 bus.. He's not getting enough pressure to his rear brakes,and the 261 sounds good,and doesn't smoke. It has hardly any power. We fixed a couple of vacuum leaks,(carb base,vent tube at manifold),but the problem persists. Brakes require 15-18 lbs.,and we gauged his 261 at between 7-8 P.S.I. Next thing will be a compression check. I suspect the valves are carboned-up,so we're going to get the engine up to operating temp,and pour water through the carb,while throttle is set at a high idle. Same result as using trans.fluid,without the smoke,and it's a lot cheaper. I HOPE this works! We may have to have the valves ground,at which time,install hardened seats,to accomodate today's un-leaded fuel. I did this to my truck,and it runs like new!
Last edited by wetwilly5757; 04/25/2014 4:29 AM.
