Re: Fuel hose length
My tank is lower then my engine also. It's at the front of the boat and is a 14 gallon step tank, mounted on the floor. It's actually a step for the deck. <br />My primer bulb is back by the motor. I'm also using 8mm hose and it's approx. 17 ft. in length.<br />Most of my heat soak is with 100-110 deg.F days here in the Northern California valley.<br /><br />While I've never had a rough run or hard start in cold or hot weather, I've noticed my engine starts faster and smoother using plain old regular fuel. I've tried doing my Honda one better by using a mid grade or premium on several outings. Bottom line is, the regular fuel works best for me.<br /><br />Fact is your motor has 3 float bowls that are full when you shut the motor off. If during a hot soak, any fuel purcolation of the fuel in the bowls will overflow into the cylinders causing rough running due to flooding.<br />This is opposite of a pump starvation because of a fault in the pump, or a long hose, or tank to low. <br /><br /> If fuel is expanding or percolating into the cylinders from the float bowls of the carbs it's very possible all the float levels are set to high. This is more likely then vapor locking.<br /><br />In summer months gas companys are very sure to have the correct additives to fight percolation. And in addition, the engine compartment in an automobile over hot manifolds is substantially greater then any temps I've witnessed under my Hondas engine cowl. <br /><br />At any case, your service department could lend you a portable tank to try. A quick disconnect at the primer bulb clamp is all that it would take to test their/your theory.<br /><br />Keep us posted please.
