I have a 4 year old Yamaha 225 4 stroke. I have had several problems with the engine stalling. On restart it sputters but will not run even after pumping up the primer bulb. It's been in the shop twice. The fuel/water separator was replaced the first time and the second time the mechanic said he found a kink in the fuel line which he corrected. But the problem persists. The last time it stalled it did restart after pumping up the priming bulb, but I have lost confidence in this engine. I boat on the Cheasepeake Bay and an unreliable engine is a BIG problem. I'm considering putting in another fuel line and bypassing the fuel/water separator on the theory that there is too much pressure drop in the fuel line to the engine. Any ideas?