Marine O2 Sensor Adapter Plate

Pictured is a custom made adapter plate for marine applications that choose to add a heated three wire or four wire o2 sensor for use when converting an engine from an open loop system to a closed loop system.

Marine o2 sensor adapter plate. O2 spacer for common log style exhaust manifolds. And sensor drive older plate v 6 oxygen v 8 chevy out volvopenta1993 volvopenta1993 and v 8 older drive chevy v 6 oxygen plate out sensor 89 95. Basic machine shop. O2 exhaust sensor used on all marine power catalyst engines.

The adapter plate bolts to the exhaust manifold riser. The part is manufactured from aluminum and is not treated with any corrosion resistance. Oxygen sensor is sold separately adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. This unique 1 thick adapter plate provides an installation option for retro fitting a oxygen sensor and or air fuel ratio gauge for tuning purposes into the most common log manifold style exhaust systems.

Ac delco part number 213 3533. The outer portion of the adapter seals with a threaded flange and o ring to prevent cooling water leakage. The howell engine developments marine oxygen sensor adapter threads into the inner portion of the exhaust manifold exposing the oxygen sensor to the engine exhaust before the cooling water is discharged into the exhaust stream. The part is manufactured from aluminum and is not treated with any corrosion resistance.

It will not fit on round or oval risers without a suitable flat area. Included with this item. Gm part number 12589321. Gaskets for adapter.

This unique 1 thick adapter plate provides an installation option for retro fitting a oxygen sensor and or air fuel ratio gauge for tuning purposes into the most common log manifold style exhaust systems.