Designed to accept popular 18mm o2 oxygen sensors.
Marine o2 sensor adapter.
When going 18 inch away from the nearest exhaust port we are almost out where the water is mixed 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.
The adapter plate bolts to the exhaust manifold riser.
The part is manufactured from aluminum and is not treated with any corrosion resistance.
The outer portion of the adapter seals with a threaded flange and o ring to prevent cooling water leakage.
Oxygen sensor is sold separately adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust.
O2 exhaust sensor used on all marine power catalyst engines.
When installing an o2 sensor in our water cooled manifolds both of these criteria seems to be hard to match.
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.
O2 oxygen sensor port plug adapters dual threaded adapter 18 to 12mm exhaust pipes bungs for harley flstf fatboy breakout dyna electra glid 4 7 out of 5 stars 16 9 99 9.
And with the o2 sandwich plate between manifold and riser the sensor is mounted.
Included with this item.
It will not fit on round or oval risers without a suitable flat area.
Designed to accept popular 18mm o2 oxygen sensors.
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.
Mercury 3 and 4 riser gasket 700 32080 2 required stainless steel 18mm oxygen sensor plug 620 50031 1 required.
Probably so moisture can drip off.
Ac delco part number 213 3533.
Gm part number 12589321.
Description 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.
A unique feature of this adapter is the cooling parts that run along each side of the sensor maintaining consistent temperature of the spacer.
