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Author Topic:   Honda 90 performance on classic 21

Orca posted 07-18-2002 10:48 PM ET (US)
My wife and I enjoy offshore passages on our 72 ribbed Outrage. With over 400 hours on the twin Honda 90 repower I never had a comfortable read on range under cruising conditions. That meaning fast, slow, idle,rough water throtle wagging ect. over many miles. Stats: 80 miles,5.6 tach hours,11.5 gals,50 miles at 5000 + rpm= 2.0 gal per hour. Boat loaded approx. 4200 lbs. Most interesting to me, engines ran great with 1/2 inch of gas in the 12gal tanks. Next test, can one run the tanks dry? Note: 11.5 per engine and milage is scaled off charts and errs to the conservative side.
Bigshot posted 07-19-2002 09:54 AM ET (US)
Damn.....how does she handle with almost 800lbs on the stern?
Other than that I am totally confused by your post but yes you can run tanks dry.
lhg posted 07-19-2002 02:15 PM ET (US)
Nick - That means he used 23 gallons of gas to go 80 miles, or 3.5 miles to the gallon. That's pretty impressive for twin 90's.
I just completed a long trip (900 miles) in my 18 Outrage, heavily loaded, with 1985 2-stroke twin Merc 115 in-line sixes, no oil injection. Averaged 2.9 miles to the gallon, both engines combined, running 25-30 mph between 2200 & 2600 RPM's. It appears that once planing at power, the 4-strokes are not that much more economical. It simply takes a certain amount of fuel to plane a boat a given speed, regardless of the style or HP of engine it's going through.
Highwater posted 07-19-2002 10:26 PM ET (US)
900 miles! Larry, did you post a trip report? Would love to hear about it. Thanks. David.

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Author	Topic: Honda 90 performance on classic 21
Orca	posted 07-18-2002 10:48 PM ET (US) My wife and I enjoy offshore passages on our 72 ribbed Outrage. With over 400 hours on the twin Honda 90 repower I never had a comfortable read on range under cruising conditions. That meaning fast, slow, idle,rough water throtle wagging ect. over many miles. Stats: 80 miles,5.6 tach hours,11.5 gals,50 miles at 5000 + rpm= 2.0 gal per hour. Boat loaded approx. 4200 lbs. Most interesting to me, engines ran great with 1/2 inch of gas in the 12gal tanks. Next test, can one run the tanks dry? Note: 11.5 per engine and milage is scaled off charts and errs to the conservative side.
Bigshot	posted 07-19-2002 09:54 AM ET (US) Damn.....how does she handle with almost 800lbs on the stern? Other than that I am totally confused by your post but yes you can run tanks dry.
lhg	posted 07-19-2002 02:15 PM ET (US) Nick - That means he used 23 gallons of gas to go 80 miles, or 3.5 miles to the gallon. That's pretty impressive for twin 90's. I just completed a long trip (900 miles) in my 18 Outrage, heavily loaded, with 1985 2-stroke twin Merc 115 in-line sixes, no oil injection. Averaged 2.9 miles to the gallon, both engines combined, running 25-30 mph between 2200 & 2600 RPM's. It appears that once planing at power, the 4-strokes are not that much more economical. It simply takes a certain amount of fuel to plane a boat a given speed, regardless of the style or HP of engine it's going through.
Highwater	posted 07-19-2002 10:26 PM ET (US) 900 miles! Larry, did you post a trip report? Would love to hear about it. Thanks. David.