Merc 50 runs better when low on gas?

C

CWARK

Cadet
Joined
Dec 24, 2007
Messages
7
I have a 2004 Merc 50 2 stroke. I have been suspicious that it is not running right for awhile. (the local mechanics say its fine)

Anyway, I was cruising down the river the other day and ran out of gas. Right before I ran out, the motor got much louder and my MPH increased from 32 to 38. (on gps) What caused this? Can I duplicate this on a permanent basis?
Thanks.
 
JB

JB

Honorary Moderator Emeritus
Joined
Mar 25, 2001
Messages
45,907
Re: Merc 50 runs better when low on gas?

Most 2 strokes do that, Cwark.

When running out of fuel they lean out to a dangerous level, but make more power unless they melt a piston, which is why they are not allowed to run that lean all the time.
 
C

CWARK

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Joined
Dec 24, 2007
Messages
7
Re: Merc 50 runs better when low on gas?

That makes sense, thank you.
 
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