We're delivering this 1984 Hunter 34 from Panama City to Clear Lake. Need to know how much fuel I'll use per hour. The engine is a Yanmar 3cyl/22hp (3GMS), with a two bladed prop about 15" diameter. Anything close will give me a good place to start. We only have a 25 gal. tank, and plan on 25 gallons extra on board too.............Pray for good winds........ Thanks, Capt'n T
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min .5 gph - max 1.0 gph
There you go. Figure a min. of .5 gph and a max. of 1.0 gph. It will depend on current, wind, condition of the hull/prop etc. How far will you be going? What type of condition is your fuel tank in? Has it been cleaned? Do you know if there is crud in the tank?
There you go. Figure a min. of .5 gph and a max. of 1.0 gph. It will depend on current, wind, condition of the hull/prop etc. How far will you be going? What type of condition is your fuel tank in? Has it been cleaned? Do you know if there is crud in the tank?
H34 fuel consumption
I agree with Steve. I have the same boat and motor and have reliably gotten 0.5 gph at cruise. Have a nice trip.
I agree with Steve. I have the same boat and motor and have reliably gotten 0.5 gph at cruise. Have a nice trip.
Yep
We too average about 0.5 gal/hr. If you are running the engine hard though, I would figure on 0.75 gal/hr. Also, it has been posed on here before that our 25 gallon tanks are closer to 20 gallons, so figure on that as well to be safe. I would figure with your 20 gallon tank and 25 extra (count on 20 so you have a 5 gal. margin of safety), you could motor about 300 miles or so averaging about 5.5 knts.
We too average about 0.5 gal/hr. If you are running the engine hard though, I would figure on 0.75 gal/hr. Also, it has been posed on here before that our 25 gallon tanks are closer to 20 gallons, so figure on that as well to be safe. I would figure with your 20 gallon tank and 25 extra (count on 20 so you have a 5 gal. margin of safety), you could motor about 300 miles or so averaging about 5.5 knts.
It seems that everyone concurs
on a burn rate of 1/2 gallon per hour. It sounds atainable but a little agressive for a three cylinder 900cc engine. To provide a safety margin I would use 3/4 gallons per hour. Realize that the full 25 gallons of your tank will not be usable. The tank will need a minimum of 3-5 gallons to prevent sucking air under sea motion. An emergency usable reserve of 10 to 15% is highly recommended so I would say that out of the 50 gallons that you carry I would only consider only 43 gallons to be usable. You are looking at available fuel for 57 hours. The mileage you get out of those hours will depend on the actual sea conditions that you motor in. If you can average 4.5 knots of speed then you have a range of approximately 255 nautical miles. At an average of 3.5 knots your range is only 200 nautical miles. Maintain a log of hours motored and recalculate at the end of each day the hours of fuel left. Also log your distance travelled and calculate the average speed. Don't know the mileage of your trip nor your intended route but would mark down posible refueling points along the route and compute on a daily basis the possibility or necessity to stop at any one of them. Hopefully you may have favorable winds and your biggest problem may be giving fuel away when you reach your destination.
on a burn rate of 1/2 gallon per hour. It sounds atainable but a little agressive for a three cylinder 900cc engine. To provide a safety margin I would use 3/4 gallons per hour. Realize that the full 25 gallons of your tank will not be usable. The tank will need a minimum of 3-5 gallons to prevent sucking air under sea motion. An emergency usable reserve of 10 to 15% is highly recommended so I would say that out of the 50 gallons that you carry I would only consider only 43 gallons to be usable. You are looking at available fuel for 57 hours. The mileage you get out of those hours will depend on the actual sea conditions that you motor in. If you can average 4.5 knots of speed then you have a range of approximately 255 nautical miles. At an average of 3.5 knots your range is only 200 nautical miles. Maintain a log of hours motored and recalculate at the end of each day the hours of fuel left. Also log your distance travelled and calculate the average speed. Don't know the mileage of your trip nor your intended route but would mark down posible refueling points along the route and compute on a daily basis the possibility or necessity to stop at any one of them. Hopefully you may have favorable winds and your biggest problem may be giving fuel away when you reach your destination.
been there dont that in that boat
Just another question i have made the Clear Lake to Mobile AL trip twice in a H34 it had a Westabeke 21 hp engine. Are you going through the canal the entire way? I am in houston now and would be intrested in talking on the phone about your up coming trip. Look me up i am located in the 40.5 owners section send me a email. Kerry
Just another question i have made the Clear Lake to Mobile AL trip twice in a H34 it had a Westabeke 21 hp engine. Are you going through the canal the entire way? I am in houston now and would be intrested in talking on the phone about your up coming trip. Look me up i am located in the 40.5 owners section send me a email. Kerry
Little better "mileage"...
Had some fuel filter issues this past summer and ran around 2,500 RPMs for a number of hours, which seemed to return about .3 to .4 gallons of fuel use an hour. Running around 3,000 RPM I figured about .4 GPH. 3GM30F with a two blade 15x12 prop in fairly flat water.
Had some fuel filter issues this past summer and ran around 2,500 RPMs for a number of hours, which seemed to return about .3 to .4 gallons of fuel use an hour. Running around 3,000 RPM I figured about .4 GPH. 3GM30F with a two blade 15x12 prop in fairly flat water.
Actually, our range is a little better than 10mpg.
On flat water, at about six knots we had a motoring range of 1100+ miles.
OK, that's with the 'cruiser load' of fuel in six jerry cans on deck, plus one below, the stern tank full and the stock tank full. In fact, we probably would have never run out.
On flat water, at about six knots we had a motoring range of 1100+ miles.
OK, that's with the 'cruiser load' of fuel in six jerry cans on deck, plus one below, the stern tank full and the stock tank full. In fact, we probably would have never run out.- Status