Break in was about 4 tanks thoroughly run through that thing
i hope you mean us gallons. my moki's don't leave the ground till i go get another case of fuel. 5 gallon break in boring as heck but the engine will be flying when we're 150 years old. they don't wear out if used like they are designed to be used. always pull a new engine apart to get the machine waste out of it. thats what causes a lot of bearing failures. being a 18/8 prop i'd say a 180