Home › Forum › Ask A Member › ’57 Golden Javelin – fuel consumption question › Re: ’57 Golden Javelin – fuel consumption question
June 28, 2018 at 2:20 pm
#78615
Echoing others’ replies: beautiful rig! There is a simple formula for fuel consumption in two-stroke motors: one gallon per hour per 10 horsepower. On that basis, your Javelin will use 3.5 gph at full throttle. Some motors will use more: Fat-Fiftys are notorious, and my 1954 Sea King 12 had an indicated run time of 1 hour on its 2 gallon internal tank. The advice to pull back on the throttle a little is sound: a small increase in speed on the water requires a much larger increase in power. Some motors have a linkage that leaves the magneto at full advance but closes the throttle butterfly somewhat.