1956 Evinrude 7.5 runs rough at high speeds

K

KentA

Recruit
Joined
Aug 26, 2008
Messages
1
I have a 1956 Evinrude 7.5 which runs well at low to moderate speeds, but runs rough (or stalls out completely) at high speeds.

It has new plugs and a new in-line fuel filter. The fuel tank is the old pressurize model, so I don't think there's a fuel filter.

Any ideas would be appreciated.

Thanks.

- Kent
 
T

tx1961whaler

Vice Admiral
Joined
May 31, 2008
Messages
5,197
Re: 1956 Evinrude 7.5 runs rough at high speeds

Just guessing, but assuming the spark and compression are OK on both cylinders, I would suspect the high speed jet in the carb is clogged
 
Chinewalker

Chinewalker

Fleet Admiral
Joined
Aug 19, 2001
Messages
8,902
Re: 1956 Evinrude 7.5 runs rough at high speeds

Could be as simple as properly adjusting the high speed needle valve. Search for Joe Reeves' post on adjusting the needles....
- Scott
 
wbeaton

wbeaton

Commander
Joined
Jul 30, 2006
Messages
2,332
Re: 1956 Evinrude 7.5 runs rough at high speeds

The original fuel filter is located in a glass bowl on the bottom of the carb.
 
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