Well we just got vapor lock on a 912iS. Successful landing. Winter blend gas from Reno/Carson/Tahoe, record high temperatures, high altitude (8000MSL) and 91MoGas. No 100LL mixture. The perfect storm. After about 8500 hours on 912iS this is a first. All of my aircraft have well ventilated engine compartments. I remember flying in hot summer days with summer gas 90 degrees no problem. Winter gas in March with summer temperatures.
So we are going to start mixing 100LL in and additionally limiting outside temperatures.
We run fuel out of low wing tanks, through the course filter, up about 2 feet to the fuel selector valve then down to the electric fuel pumps. I am assuming once it hits the electric fuel pumps and the pressure is boosted to 40+ psi before the fine fuel filter we are pressurized enough where vapor lock is less probable to the engine. Most probable in the fuel tanks to fuel pumps? Trying to conform my understanding of the situation. Any thoughts/experience is appreciated.
