RE: OS 91 FS Surpass problems
Sounds (1) too rich or (2) fuel blockage. The engine is just not set up right yet. It would not run fast if the valve time were off. Clearances on the tappets is important but would not keep it from idling. New con rod would not make much difference. And air leak could be your problem, check the intake manifold gaskets/O-rings. I had a Maggie with half the intake manifold gasket missing and it still ran fast but no idle. Could be a tad piece of old Castor in the idle loop some where, in the spray bar. Carbs are simple, take it apart and clean it up. Sounds like a good engine, jest been sitting around for while.