Logo
FULL SITE MENU

Fuel type 2005 Johnson 115 hp 2cycle

Could you expand on that ? Why?, and or what should be used instead ? This is the fuel offered everywhere.
 
E85 is 85% ethanol and 15% gasoline. The vaporization temperature, flashpoint, and specific gravity of this fuel mixture is vastly different than the gasoline outboards are designed to use. The carburetor venturis, fuel jets, and fuel pump are all calibrated to deliver the correct amount of 100% gasoline, or E10 gasoline. Using E85 will likely result in a very lean fuel mixture in your engine causing excessive heat on your piston domes and eventual melting of the pistons.

Ethanol containing fuel, even E10 and especially E85, is hygroscopic, meaning it draws moisture leading to water phase separation in your gasoline tank. Water doesn't burn leading to gummy deposits, goopy sludge, and corrosion in your fuel system. E10 can be used in an outboard, but 100% non-ethanol gasoline is the preferred fuel because it does not tend to draw moisture and thus performs better in the humid, marine environment.
 
kevinj said:
E85 is 85% ethanol and 15% gasoline. The vaporization temperature, flashpoint, and specific gravity of this fuel mixture is vastly different than the gasoline outboards are designed to use. The carburetor venturis, fuel jets, and fuel pump are all calibrated to deliver the correct amount of 100% gasoline, or E10 gasoline. Using E85 will likely result in a very lean fuel mixture in your engine causing excessive heat on your piston domes and eventual melting of the pistons.

Ethanol containing fuel, even E10 and especially E85, is hygroscopic, meaning it draws moisture leading to water phase separation in your gasoline tank. Water doesn't burn leading to gummy deposits, goopy sludge, and corrosion in your fuel system. E10 can be used in an outboard, but 100% non-ethanol gasoline is the preferred fuel because it does not tend to draw moisture and thus performs better in the humid, marine environment.
Click to expand...
Got it thanks.
 
Your motor is not designed to run anything with more than 10% ethanol in it. Pretty sure it says that in your owner's manual. It might be possible to run with a re-jet which would be trial and error and possible engine damage. Stay with either premium or anything with 10% ethanol or less.
 
racerone said:
Are you sure it is 85% ethanol ???
Click to expand...
It's a actually between 51% and 81% .
Never know . It is corrosive as well and will gunk up when left in fuel tank and carbs .
Shelf life varies between one month and 90 days depending on which source you read .
Definitely not the preferred fuel.
 
I don't know where you are (if CA, I'm sorry for your fuel issues).
In WI, we typically have 10% ethanol at 87 octane, 15% ethanol at 88 octane & pure premium fuel. Some stations near big boating areas also carry pure 87 octane.
I don't drive anything that requires premium. No turbos, no performance engines.
Boats, snowmobile, mowers & other small engines all get pure 87 octane.
Car gets 10% as I drive it often enough fuel doesn't get old. Car is "flex fuel" Ford. But it never sees the E15 or E85.
 
Droid said:
I don't know where you are (if CA, I'm sorry for your fuel issues).
In WI, we typically have 10% ethanol at 87 octane, 15% ethanol at 88 octane & pure premium fuel. Some stations near big boating areas also carry pure 87 octane.
I don't drive anything that requires premium. No turbos, no performance engines.
Boats, snowmobile, mowers & other small engines all get pure 87 octane.
Car gets 10% as I drive it often enough fuel doesn't get old. Car is "flex fuel" Ford. But it never sees the E15 or E85.
Click to expand...
Not all premium fuel is ethanol free, most is but not all. At least in Canada.
 
William01 said:
Not all premium fuel is ethanol free, most is but not all. At least in Canada.
Click to expand...
IIRC our last govt mandated ethanol in all fuel. Canadian Tire used to be ethanol free in premium, but now the pumps have a sticker, “ may contain up to 10% ethanol”. I’m not sure if She’ll V-Power is still ethanol free.
 
Edchris177 said:
IIRC our last govt mandated ethanol in all fuel. Canadian Tire used to be ethanol free in premium, but now the pumps have a sticker, “ may contain up to 10% ethanol”. I’m not sure if She’ll V-Power is still ethanol free.
Click to expand...
This is true, you have to look for the ETHANOL FREE sticker on the pump even if it is premium. Here in Central Illinois I have 2 stations that offer ethanol free gas, unfortunately they are both premium 93 Octane fuel. My boat engines only require 87 octane, but I pay the extra to get the ethanol free gas and avoid fuel issues.
 
flyingscott said:
Your motor is not designed to run anything with more than 10% ethanol in it. Pretty sure it says that in your owner's manual. It might be possible to run with a re-jet which would be trial and error and possible engine damage. Stay with either premium or anything with 10% ethanol or less.
Click to expand...
Thanks yeah don’t have an owners manual. I guess I was just curious if everyone uses a mid grade or higher fuel type and I meant 85 octane not ethanol just to be clear.
 
Back
Top