620-38080 Whether you're a tuner seeking to add a popular Air/Fuel ratio gauge or you're entering the world of aftermarket fuel injection we have developed the critical part to make this addition a snap. This billet aluminum anodized wedge is at just the perfect angle to allow re-connection of your original exhaust hose. The kit includes (1) O2 adapter wedge, (2) gaskets, and (2) new front attachment studs. Bolt pattern is 3" x 4.5". Designed to fit the Hardin Marine Seaward Manifolds only.
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620-38081 + Option(s) Seaward O2 Wedge / Gauge Kit
- Gauge kit includes custom tuned .1 AFR Resolution Bosch LSU 4.9 Sensor, 8ft. wiring harness, 304 stainless steel weld-in bung, mounting hardware, and detailed instructions for installation
- 0-5v data and serial data outputs for ECU, data acquisition unit, or Laptop tuning
- User programmable range for Rich/Stoic/Lean conditions
- Peak recall/memory
- 10:1 to 20:1 AFR range for gasoline applications
- 12 and 16 volt compatible, compatible with nearly every street car or race car electrical system
- User Programmable Warning Function
- Display data in Lambda or numerical A/F ratio
Whether you're a tuner seeking to add a popular Air/Fuel ratio gauge or you're entering the world of aftermarket fuel injection we have developed the critical part to make this addition a snap. This billet aluminum anodized wedge is at just the perfect angle to allow re-connection of your original exhaust hose. The kit includes (1) O2 adapter wedge, (1) gasket, and (2) new front attachment studs.
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620-32435 O2 Spacer, For Common Log Style Exhaust manifolds
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 part is manufactured from Aluminum and is not treated with any corrosion resistance. Designed to accept popular 18MM O2 Oxygen sensors.
TECH NOTE: Will O2 Sensors Work In marine exhaust systems?
YES FOR TUNING but they have limitations as water / moisture is a byproduct of combustion. Often boaters find there is moisture in their exhaust system that have collected or made their way inside of what is better known as the "DRY" exhaust stream of their exhaust system. Anything from steam like to little water droplets about 1/32" all around the inside of the exhaust. This is because water IS a by product of combustion. same thing you see on a cold morning behind cars. sometimes you see water dripping out.
Don't take our word for it ask a real rocket scientist: https://www.grc.nasa.gov/www/k-12/airplane/combst1.html
This is why O2 Sensors are great for tuning but have a limited long term life span unless protected by Catalytic converters like on New Marine engine offerings. So you know gas is known as a hydrocarbon based fuel. And we all know what hydro means WATER.
- For Log Manifolds
- 5" Outside Diameter
- 3" Inside Diameter
- 1" Thick
- 18MM O2 hole
- 2-15/16" Bolt Hole to Bolt Hole (Adjacent)
- 4-1/8" Bolt Hole to Bolt Hole (Across)
- Mounting Hardware is NOT INCLUDED
- Riser Gaskets sold separately (500-718) 2 Required
- Stainless Steel 18MM Oxygen Sensor Plug sold separately (620-50031) 1 Required
- Sold Each
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620-32430 O2 Spacer, Stock Mercury Riser
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 Mercruisers most common Wet Joint style exhaust manifold systems. The part is CNC machined from 6061 Billet Aluminum then Naval Spec Hard Coat anodized for corrosion resistance (Beware of inferior non-coated versions)
A unique feature of this adapter is the cooling parts that run along each side of the sensor maintaining consistent temperature of the spacer. Designed to accept all popular 18MM O2 Oxygen sensors.
- Mercury 3 and 4" Riser Gasket(700-32080) 2 Required
- Stainless Steel 18MM Oxygen Sensor Plug(620-50031) 1 Required
TECH NOTE: Will O2 Sensors Work In marine exhaust systems?
YES FOR TUNING but they have limitations as water / moisture is a byproduct of combustion. Often boaters find there is moisture in their exhaust system that have collected or made their way inside of what is better known as the "DRY" exhaust stream of their exhaust system. Anything from steam like to little water droplets about 1/32" all around the inside of the exhaust. This is because water IS a by product of combustion. same thing you see on a cold morning behind cars. sometimes you see water dripping out.
Don't take our word for it ask a real rocket scientist:
https://www.grc.nasa.gov/www/k-12/airplane/combst1.html
This is why O2 Sensors are great for tuning but have a limited long term life span unless protected by Catalytic converters like on New Marine engine offerings. So you know gas is known as a hydrocarbon based fuel. And we all know what hydro means WATER.
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620-50031 Stainless Steel 18MM Oxygen Sensor Plug
This plug only is designed fit popular O2 bungs and ports designed to allow you to cap/plug a oxygen sensor bung Price does not include bung only plug. Sold Each. 18mm x 1.5
Note: This is a plug only
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620-50034 Stainless Steel Oxygen Sensor Bung - Hex Head
These bungs are designed to allow you to weld in a oxygen sensor bung for convenient fuel injection or air fuel ratio calibration. Price does not include installation/welding. Sold Each. 18mm x 1.5, Hex Head
Note: This is a bung and plug only, no installation is done.
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620-50030 Stainless Steel Oxygen Sensor O2 Bung
These bungs are designed to allow you to weld in a oxygen sensor bung forconvenient fuel injection or air fuel ratio calibration. Price does not include installation/welding. Sold Each. 18mm x 1.5
Note: This is a bung and plug only, no installation is done.
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620-50020 Stainless Steel Oxygen Sensor O2 Bung Fitted to Tailpipe (Each)
These bungs are designed to allow you to weld in an oxygen sensor bung for convenient fuel injection or air fuel ratio calibration.
Universal M18x1.5 thread pitch. Fits most wideband & narrow band O2 sensors. Requires welding.
Note: This part will be fitted to Hardin Marine tailpipes. These must be ordered with Hardin Marine tailpipes. It does not include a plug, see related parts if you need a plug.
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620-32436
- For Log Manifold O2 spacer 620-32435
- Includes 4 studs, 4 washers, and 4 nuts, all 5/16"
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This Part has options, please click the button below to order.
121-1210 Max Volt Catalyst Eliminator Computer
The Catalytic Eliminator Computer (CEC) is designed specifically for marine engine application testing. A team of marine electrical engineers created this easy to use testing tool to define failed secondary or post O2 sensors needed for replacement. There is no cutting or splicing of wires; everything is plug and play! Perfect for testing a replacement performance or racing only non-O2 based exhaust system with a header system to obtain peak engine performance data.
If your boat has fouled its post oxygen sensors and is no longer under the factory warranty, then you know what it costs to have new sensors installed and the trouble codes cleared. This unit will bypass post O2 sensors and solve a failed/plugged or no cat application.
Note:
- Only works with the 4 pin plug switching style O2 sensors.
- Will not work on the newer wide band O2 sensors with 6 pin plugs.
- Works with Mercruiser applications ONLY.
WARNING! This module is not to be used on emissions regulated waterways. The intent of this module is to allow the running of a catalyzed marine engine without the catalytic converters installed and without triggering any ECU error codes. With the engine operating in this condition, the emissions control system will be rendered inoperative. For this reason, do not operate the vessel on emissions regulated waterways. This computer system is not legal for any purpose other than testing purposes and not for use on any state or federal waterway.
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