The engine problem is a head scratcher but definitely not related to your blowers. Those only serve to remove gas vapor that may be sitting in the bilge and prevent explosion -- they have no effect on engine temperature or how an engine would run.
I'd say you're looking at a fueling problem related to vapor lock. Have you checked/changed your fuel filters? I'd start there.
The steering issue would be due to a worn helm and an old and sticky steering cable. SkiDim sells a kit with a new helm and cable -- it really makes your steering 1-finger smooth and easy.
Former owner of a 1987 Supra Saltare. Current owner of a Malibu 23LSV.