My 1991 Evinrude stalls at approx 5200 rpm when the boat trim indicator shows about 3/4 trim or more. The motor runs fine below 1/2 trim. I replaced the VRO with a pump without oil injection trying to resolve the stalling problem after which I realized it was only stalling when trimed above 3/4. I don't see any pinched hoses. I am mixing 50 to 1. Also, the motor will not trim out when moving, I must trim before I apply power.
