How far can your boat go

[drome]

I've been wondering this for years... But how do you guys figure out how far your boat can make it on a full tank? 

Also where can you find the specs on the size tank that came from the manufacturer?

Dennis

[Hotrod]

When I use to launch my boat, I'd put 15 gallons in the tank.  40 gallon tank.

I was running 10-15 miles each way.
and used a little less than the 15 gallons.

19' CC
115 Evin.

The first time i inspected my tank I measured it and came up with it's size.  If that's what your looking for.

Now that I dock her..  a full tank last me more than 4 trips since I'm 2.5 miles from the inlet.

[catfish hunter]

ask this on the hull truth and you should be able to get the specs

[drome]

Well I just found out that mako has put the specs to boats from the fifties on its site now.

My mako has a tank capacity of 130 gallons...

It has twin 150's outboards.   Someone once told me that the rule of hand is at a decent cruise you burn 1.5 gallons per hour, so I would burn 3 gallons per hour at 30-32 miles per hour in the bay and maybe 20-25 in the ocean.

Does this sound realistic - the boat can run for 43 hours on a full tank or 860 miles.

If it is, man was I wrong.  I get worried wondering how far the boat can make it.

[Kahoots]

not with twin 150's & 30 mph's, i would make sure

[drome]

not with twin 150's & 30 mph's, i would make sure

Making sure is why Im asking here

What's the formula you use to determine not with twin 150's and 30 mph?

[Capt. Ed]

Hi Dennis,

The rule of thumb, if you have not calculated the fuel consumption with your exact motors or with a flow scan for dual outboards with a full tank of gas, 1 mile per gallon. You can easily figure if you are getting more or less but I think that is a very good number.

So, using the rule of thirds (1/3 out, 1/3 back and 1/3 reserve) you good get approximately 87 miles of running at mid-range (3,800 rpm for Yamaha) with the rest for reserve.

What year and make are engines? We can look up the fuel consumption curve.

If you are trolling, that gas has to be fatored in as well.

The reserve is sacred. It helps on the days with nasty seas and winds.

It is hard to get exact numbers without a flow scan and each day is different with different conditions.

Best wishes,

Ed


I will be more than happy to help you calculate it this Summer.

[Kahoots]

no formula,commen sense,860 miles?show me.we burn approx.120gals.running from C.M.to baltermore an back,thats with twin130's four stroke on 25 seacraft

[drome]

no formula,commen sense,860 miles?show me.we burn approx.120gals.running from C.M.to baltermore an back,thats with twin130's four stroke on 25 seacraft

While the math seemed to work, I knew something was wrong.... 860 miles, I could almost get to florida

Ed I'm going to the boat next weekend and Im going to get the exact specs off the engine tags so I can look up the information. 

Thanks for all the help everyone!!

[Kahoots]

sorry for sounding sarcastic,100 miles offshore no  place to be without fuel.coast gauard will not bring you fuel,you might want to join SEA TOW FOR $119 a year its worth the peace of mind. GOOD LUCK
                          Kahoots