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Catalina/Capri 25/250 Sailor's Forums

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Honda 8 gph

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Tradewind
Admiral

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USA
531 Posts

Initially Posted - 04/06/2017 : 15:57:57

I have a Honda 8 on my C-250, usually only motor in and out of the marina so don't have a real good handle on how much fuel is burned per hour. In June I'm planning a trip, about 30nm each way, motoring most of the trip, and trying to figure how much fuel I might need. Anyone help me with a guesstimate? I'll probably be motoring in relatively calm waters at 4-5 kts and fuel will be available at my destination so I'm guessing around 6 or 7 hours each way.

1998 250WK #331
CILCIA
Steve
Pensacola, FL

Dave5041
Former Mainsheet Editor

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USA
3758 Posts

Response Posted - 04/06/2017 : 17:07:13

My Merc 9.9 burns less than 1/2 gal per hour at around 4.5 kts. in 1 footers. I would fill both of my 3 gal tanks for a trip like that. I ran out of gas once a few years ago and have never cut it close since.

Dave B. aboard Pearl
1982 TR/SK/Trad. #3399
Lake Erie/Florida Panhandle

Edited by - Dave5041 on 04/06/2017 17:10:20

Tradewind
Admiral

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USA
531 Posts

Response Posted - 04/06/2017 : 17:21:16

Thanks Dave, I have a 3 gal tank on board and plan to take two 2 1/2 gal spares. There is a fuel stop half way on my trip but I didn't really want to stop. Eight gallons should do it.

1998 250WK #331
CILCIA
Steve
Pensacola, FL

Edited by - Tradewind on 04/06/2017 17:25:16

Voyager
Master Marine Consultant

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USA
5379 Posts

Response Posted - 04/06/2017 : 17:44:51

I figure on one gallon per hour but I usually get 1.25 hours per gallon. If I run at 3/4 throttle I do much better but there are times when I max out the engine to get the extra 1/2 knot, so my gas mileage suffers as a result. I'd have six gallons on hand for a 6-7 hour trip. Nothing kills time like having to stop off for gas.
Of course, never try to keep to a schedule if weather conditions don't permit. This is one of the best ways to get yourself into trouble.

Bruce Ross
Passage ~ SR-FK ~ C25 #5032

Port Captain � Milford, CT

Stinkpotter
Master Marine Consultant

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Djibouti
9081 Posts

Response Posted - 04/06/2017 : 21:49:33

quote:
Originally posted by Voyager

...I max out the engine to get the extra 1/2 knot, so my gas mileage suffers as a result.

Wow--I never ran that engine (on that very boat) at full throttle. Half to two thirds got me to about 5.5 knots--more just made more noise, would tend to cavitate, and obviously would eat a lot more gas. 6.0 knots is all we can hope for under power--theoretically 6.3, but that's with a shiny hull and no keel. (Yes, in a big breeze, the sails can deliver a lot more power.) I think we got about 2/3 gallon per hour at 5.5 knots with our high-thrust Honda 8. For distances, we had a 6-gallon primary and the Honda's 3-gallon as a backup. That was about 12-13 hours of fuel--four of that on the backup if we had to look for a marina with gas. (We never used it.)

(Day sailers and racers scoff at motoring on open water... Cruisers trying to get somewhere admit to typically spending a majority of their time under power--or at least "motor-sailing"--whether in no wind, wind on the nose, or too much wind.)

Dave Bristle
Association "Port Captain" for Mystic/Stonington CT
PO of 1985 C-25 SR/FK #5032 Passage, USCG "sixpack" (expired),
Now on Eastern 27 $+!nkp*+ Sarge

Edited by - Stinkpotter on 04/06/2017 21:57:06

OLarryR
Master Marine Consultant

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USA
3467 Posts

Response Posted - 04/07/2017 : 04:25:29

When I was planning a similar length trip (which did not happen), I estimated based on my normal excursions which is about 4.5 to 5 miles to the Wilson Bridge south on Potomac River, approximately 3/4 gallon at about 4+ mph takes about an hour. So, I estimated it would take me going south 30 miles....7-8 hours. At 3/4 gallons per hour, figured I needed ~ 6 gallons. Rather than use a jug to fill up my 3 gallon tank, I bought a 6 gallon tank and planned to bring it along with my 3 gallon. Between the two, I definitely would have enough fuel even if I had wind and current against me. Also, I would not have to transfer fuel into a tank onboard.

Larry
'89 Robin's Nest#5820, Potomac River/Quantico, Va
http://catalina25.homestead.com/olarryr.html

islander
Master Marine Consultant

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USA
4024 Posts

Response Posted - 04/07/2017 : 07:06:07

If you figure on 1gal. Per hour you will automatically give yourself a cushion. You don't really want to be sweating out the last few miles.

Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound

JohnP
Master Marine Consultant

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1520 Posts

Response Posted - 04/07/2017 : 07:15:42

I have a Honda 9.9hp engine. When there is no wind at all, one 5 1/2 gallon tank of gas can bring us back approx. 40 miles from St. Michaels, MD to my marina on the Magothy River north of Annapolis. That's at a speed of 4.5 to 5 kt.

JohnP
1978 C25 SR/FK "Gypsy"
Mill Creek off the Magothy River, Chesapeake Bay
Port Captain, northern Chesapeake Bay

Tradewind
Admiral

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USA
531 Posts

Response Posted - 04/07/2017 : 15:47:55

Thanks for all the input. I think Ill plan on my 6 gal in the fuel locker and the 3 gal on the side. Hopefully I'll have some wind, don't want to listen to the noise, but in any case 9 gal should be plenty.

1998 250WK #331
CILCIA
Steve
Pensacola, FL

Stinkpotter
Master Marine Consultant

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Djibouti
9081 Posts

Response Posted - 04/08/2017 : 13:35:31

Unlike my current boat

the C-25 has an alternate power source, which we used when our older motor blew a cooling hose and we needed to enter an unfamiliar, narrow harbor and get into a marina: the sails.

Dave Bristle
Association "Port Captain" for Mystic/Stonington CT
PO of 1985 C-25 SR/FK #5032 Passage, USCG "sixpack" (expired),
Now on Eastern 27 $+!nkp*+ Sarge

islander
Master Marine Consultant

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USA
4024 Posts

Response Posted - 04/08/2017 : 14:01:08

Better man than me Dave, I'll call Sea Tow

Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound

Stinkpotter
Master Marine Consultant

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Djibouti
9081 Posts

Response Posted - 04/09/2017 : 07:45:30

We called TowBoatUS--they were too far away and a storm was arriving. We arrived at the dock under furling genny in light rain. A marina guy caught my bow pulpit, and we were golden. Now if TowBoatUS doesn't come, I guess I drop the anchor to keep the tide from taking me to Ireland, Portugal, or wherever...

Dave Bristle
Association "Port Captain" for Mystic/Stonington CT
PO of 1985 C-25 SR/FK #5032 Passage, USCG "sixpack" (expired),
Now on Eastern 27 $+!nkp*+ Sarge

sdpinaz
Navigator

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USA
193 Posts

Response Posted - 04/09/2017 : 09:46:27

Dave,
do you have a little outboard bracket on Sarge?

Scott
'88 WK/SR #5727

Voyager
Master Marine Consultant

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USA
5379 Posts

Response Posted - 04/09/2017 : 13:21:38

Just to be clear I don't ever run the engine @ full throttle. Kinda pointless. I have cranked her during evasive maneuvers in the marina. The other thing that's saved my bacon is the reserve in the six gallon tank. Just enough gas to get you inside the harbor and up to the dock.

Bruce Ross
Passage ~ SR-FK ~ C25 #5032

Port Captain � Milford, CT

Stinkpotter
Master Marine Consultant

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Djibouti
9081 Posts

Response Posted - 04/10/2017 : 11:36:27

quote:
Originally posted by sdpinaz

Dave,
do you have a little outboard bracket on Sarge?

Bracket? Yes. Little? Not so much... It's a full-width Armstrong bracket/platform holding a 225 hp, 3.5 liter Honda V6 outboard (the basic engine in the Honda Pilot SUV).

(When I was a kid, I thought the Johnson/Evinrude 50hp V4 outboard was HUGE!)

Dave Bristle
Association "Port Captain" for Mystic/Stonington CT
PO of 1985 C-25 SR/FK #5032 Passage, USCG "sixpack" (expired),
Now on Eastern 27 $+!nkp*+ Sarge

Edited by - Stinkpotter on 04/10/2017 11:40:00

Dave5041
Former Mainsheet Editor

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USA
3758 Posts

Response Posted - 04/10/2017 : 13:49:30

And some of the big engines come with turbos now.

Dave B. aboard Pearl
1982 TR/SK/Trad. #3399
Lake Erie/Florida Panhandle

Stinkpotter
Master Marine Consultant

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Djibouti
9081 Posts

Response Posted - 04/11/2017 : 06:10:53

I haven't seen that, but some big Mercs have superchargers.

Dave Bristle
Association "Port Captain" for Mystic/Stonington CT
PO of 1985 C-25 SR/FK #5032 Passage, USCG "sixpack" (expired),
Now on Eastern 27 $+!nkp*+ Sarge

Dave5041
Former Mainsheet Editor

Members Avatar

USA
3758 Posts

Response Posted - 04/11/2017 : 08:39:27

Turbos are more popular in the 2 stroke, diesel, and racing market outboards. They are also increasingly appearing on sterndrives and diesel inboards.

Dave B. aboard Pearl
1982 TR/SK/Trad. #3399
Lake Erie/Florida Panhandle

GaryB
Master Marine Consultant

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USA
4304 Posts

Response Posted - 04/12/2017 : 17:21:00

quote:
Originally posted by Stinkpotter

quote:
Originally posted by sdpinaz

Dave,
do you have a little outboard bracket on Sarge?

Bracket? Yes. Little? Not so much... It's a full-width Armstrong bracket/platform holding a 225 hp, 3.5 liter Honda V6 outboard (the basic engine in the Honda Pilot SUV).

(When I was a kid, I thought the Johnson/Evinrude 50hp V4 outboard was HUGE!)

Years ago when I was kid my dad was trying to manual start an old 25 HP Johnson outboard we had on our boat. A guy walked up and said I see you have an Armstrong motor. My dad said no it's a Johnson. The guy said no it's an Armstrong, makes your arm strong trying to start it. :)

Association Member

GaryB
Andiamo
'89 SR/WK #5862
Kemah,TX

Edited by - GaryB on 04/12/2017 17:21:24

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