Fuel System Parts - O2 Sensor

Delco 4 Distributor Cap replaces MerCruiser part # 393-9459

Delco 6 Distributor Cap replaces MerCruiser part # 33765

Additional Details:

• Fits: New GM Style "Module in Cap" Distributors- V-8 Applications Except MPI Engines With ECM 555

Use With:

• 18-5405: Rotor

Interchanges/Replaces

CDI

• E64-0014

Crusader

• 38070

GLM

• 71400

Indmar

• 556083

Mallory

• 9-29411

Mercruiser Stern Drive

• 804418
• 808483
• 808483T
• 808483T3

OMC Stern Drive

• 3854548

Volvo Penta

• 3854548

Distributor Cap - Mercury V8 Prestolite V8 - 393-4988T2

• Replacement distributor cap for Flame-Thrower distributors.
• High dielectric strength cap
• Caps for Flame-Thrower "Billet" distributors available with male or female brass terminals.

Interchanges/Replaces

Mallory

• 9-64415

Yamaha Outboard

• 65L-11357-00-00
• 68F-11357-00-00
• 68F-11358-00-00
• 68F-W1135-00-00

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

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.

• Replacement distributor cap for Flame-Thrower distributors.
• High dielectric strength cap
• Caps for Flame-Thrower "Billet" distributors available with male or female brass terminals.

Key Features:

• Fits: GM New Generation LS Series Small Block
• Indmar / Pleasurecraft / Mastercraft

Interchanges/Replaces

Mallory

• 9-32150

Key Features:

• Fits: GM New Generation LS Series Small Block
• Indmar / Malibu / Ilmor

Interchanges/Replaces

Mallory

• 9-32151

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

Stainless Steel 18MM Oxygen Sensor Plug - Hex Head

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, Hex Head.

• For Log Manifold O2 spacer 620-32435 
• Includes 4 studs, 4  washers, and 4 nuts, all 5/16"
  

Cap & Rotor Kit replaces MerCruiser part # 811635Q2

For V4 Delco Late Style EST

Distributor Cap replaces MerCruiser part # 811635T3

For V4 Delco Late Style EST

Cap & Rotor Kit replaces MerCruiser part # 850484T3

For V6 Delco Late Style EST

Distributor Cap replaces MerCruiser part # 850484T2

For V6 Delco Late Style EST

Distributor Cap (V6 MerCruiser) replaces MerCruiser part # 815407A2