The primary goal of a MANET routing protocol is to provide a stable and efficient route to exchange messages between source and destination in a timely manner. This paper proposes an adaptive mechanism, namely Optimised Border node based Most Forward within Radius (OBMFR) mechanism to improve the method of choosing forwarding nodes towards the destination. The routing constraints such as region, mobility speed, residual energy and queue length are utilised by fuzzy logic controller to elect the potential forwarding node to improve the stability of routing paths. The performance metrics such as delay, routing overhead and energy consumption are significantly reduced as inferred from NS2 simulation.