ep_brooklyn
Member
Hello All,
I have a 1978 34 foot Chris Craft CoHo with twin Chevy 350's, 285 HP each. There are two 100 gallon fuel tanks on board which cannot be removed without pulling both engines again. I have completely repowered both power plants from top to bottom EVERYTHING brand new, however, soon after the completion of the project I learned the man I bought the boat from had left 30-40 gallons of fuel in each tank for 3 years during storage before I bought it. Now as you could guess I am stalling due to clogged fuel lines. After one incident I removed the brand new Holly mechanical fuel pump and it was filled with a brown rusty scale. I was considering sticking 10 feet of 3/8 inch fuel line down into the fill-up port and using my spare 12 Volt electrical fuel pump to try to get as much gas, grime and scale out as I could. My concern is that this would leave a concentrated mess of grime, rust and gelled deposits on the bottom of the tank compounding the problem. I initially tried to run the fuel level down to approx 20 gallons and then tried to dillute the problem by adding 20 gallons of fresh Hi-octane and cleaned out all the lines but still had the same problems after 20 minutes of running. Anyone have an idea on the right way to get old gas and crap out of these 2 huge tanks?
I have a 1978 34 foot Chris Craft CoHo with twin Chevy 350's, 285 HP each. There are two 100 gallon fuel tanks on board which cannot be removed without pulling both engines again. I have completely repowered both power plants from top to bottom EVERYTHING brand new, however, soon after the completion of the project I learned the man I bought the boat from had left 30-40 gallons of fuel in each tank for 3 years during storage before I bought it. Now as you could guess I am stalling due to clogged fuel lines. After one incident I removed the brand new Holly mechanical fuel pump and it was filled with a brown rusty scale. I was considering sticking 10 feet of 3/8 inch fuel line down into the fill-up port and using my spare 12 Volt electrical fuel pump to try to get as much gas, grime and scale out as I could. My concern is that this would leave a concentrated mess of grime, rust and gelled deposits on the bottom of the tank compounding the problem. I initially tried to run the fuel level down to approx 20 gallons and then tried to dillute the problem by adding 20 gallons of fresh Hi-octane and cleaned out all the lines but still had the same problems after 20 minutes of running. Anyone have an idea on the right way to get old gas and crap out of these 2 huge tanks?