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115 HP Performance Chart

tboltmike

tboltmike

Regular Contributor
"This is fuel consumption data

"This is fuel consumption data taken from my 1975 Johnson and Arrow Glass Trihull. Lowrance LMF 400 used used to collect data.
Hope you enjoy this.
Mike<center><table border=1><tr><td>http://www.marineengine.com/discus/icons/mime_pdf.gif""" align=left alt=""application/pdf"">Fuel Consumption vs RPM
[url=""][b]Performance Data.pdf[/b][/url] (15.4 k)</td></tr></table></center>"
 
running a 1994 evinrude 88 on

running a 1994 evinrude 88 on a 17 foot heavy gauge fully rigged aluminum bass boat...ran both since they were new....from experience and making almost the same 12 mile run to my fishing spots over the years you numbers look dead on...outboards can suck up some gas cant they?
 
Its what we have been telling

Its what we have been telling our customers for years and carby model outboards really didnt improve on your figs over the years
 
"One thing that I thought was

"One thing that I thought was interesting is that the on plane mileage is better than pre transition to plane mileage. However, the manual says that it should get the best economy by coming off WOT a little.

The ETEC site shows similar graphs for various hull types. But they get the best mileage in the displacement speeds not plane.

I guess the carbies are much less efficient at low speeds.

Do you thing the loopers are more efficient than cross flows?

Want to point out that mine is a very low hour motor for the age. The carbs are still untouched from the factory as is the powerhead.
It had the spark retarded in the 80's per dealer recommendation during the transition to unleaded. Not sure if that was an OMC bulletin."
 
It takes alot of power to get

It takes alot of power to get over the hump but once on the plane you can throttle back and stay on the plane getting the best fuel economy
 
"i like 3800-4200 for safety a

"i like 3800-4200 for safety anyway because of the swamps i run in....but an outboard(2 cycle) is designed to run at top rpm so its good to blow them out for a couple miles every trip....my carbs havent been touched either in 15 years of running but i do run an additive a few times a year.after owning and running outboards for 42 years i finally decided sea foam does all i need to do and quit all the others....there was a lotta talk on here about a year ago on the pro,s and con,s of running gas out of the carbs after every trip....the consensus was to leave the gas in....i disagree with that....i run out but do it at low rpm....another thing i do is get new plugs in once a year...i dont care how good they look...and the usual...water pump and lower unit oil...the easiest way for me to time that stuff is to set a month to do stuff...november is lower unit oil chasnging etc.."
 
"Thanks for the insight guy.

"Thanks for the insight guy.

Even though we are off subject, I'll add this about how I leave my carbs. This was the instruction from the old time OMC dealer in town.

He said to run the engine in fresh water or hose, disconnect the fuel line and run at idle until the engine first starts to speed up
(indicating that the bowls are near empty) and chock the engine to kill it.

I have done this for some 20+ years with this engine and have had no problems."
 
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