Rich/Lean Indicator with Heated Oxygen Sensor
RICH/LEAN INDICATOR
Part #
MSD8933
Price: $175.10
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The Rich/Lean Indicator makes tuning your engine a simple job. By measuring the amount of oxygen in the exhaust, the RLI will tell you whether your engine is running on the rich or lean side of stoichiometry (14.7:1 air/fuel ratio). This indicator is especially helpful in tuning after making carburetor, fuel injection or intake manifold changes.

The Rich/Lean Indicator uses a heated titanium oxygen sensor to measure the oxygen content in the exhaust. This sensor screws into a special 7/8” boss that is easily welded into the exhaust. The Rich Lean Indicator Control Unit can be dash mounted or hand-held and has two lights. When the Green light is on the mixture is rich and when the Red light is on it indicates the mixture is lean. The point of stoichiometry is when the light switches rapidly between Green and Red. This indicator can be used to check the mixture at idle, wide-open throttle and during other operating conditions.


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