Tecnoseal Onan Zinc Pencil Anodes for Marine Generator Cooling Systems

Tecnoseal Onan Zinc Pencil Anodes for Marine Generator Cooling Systems

Tecnoseal Onan zinc pencil anodes are replacement sacrificial anodes designed for compatible Onan marine generator cooling systems and heat exchangers. Their zinc bodies help protect metallic components exposed to cooling water against galvanic corrosion by acting as replaceable sacrificial elements.

The range includes four models with different body dimensions and mounting connections. The Tecnoseal 02030 measures 10 mm in diameter and 30 mm in length, while the 02031 features a 13 x 26 mm body. The 02032 measures 11 x 31 mm with an M8 threaded connection, and the 02033 has a 12 x 40 mm body with a 3/8" UNC thread.

The 02030 and 02031 use the Tecnoseal T2 pencil configuration, with mounting extension dimensions of 6 x 8 mm and 5 x 9.5 mm respectively. The 02032 and 02033 feature the T1 configuration, with threaded mounting extensions measuring 9 and 10 mm in length.

All four anodes are manufactured from zinc and supplied individually without brass mounting plugs. Their weights range from 0.02 to 0.03 kg, depending on the model.

Key Features

• Manufacturer: Tecnoseal
• Compatible Brand: Onan
• Product Type: Sacrificial pencil anode
• Material: Zinc
• Application: Marine generator cooling systems and heat exchangers
• Configuration: Anode Only
• Available Models: 02030, 02031, 02032, 02033
• Body Diameters: 10, 11, 12 and 13 mm
• Body Lengths: 26–40 mm
• Mounting Connections: 8 mm, 9.5 mm, M8 and 3/8" UNC
• Pencil Types: T1 and T2
• Weight Range: 0.02–0.03 kg

Available Models and Technical Specifications

Individual Model Specifications

Tecnoseal 02030 – Onan Zinc Pencil Anode Ø10 x 30 mm

The Tecnoseal 02030 features a cylindrical zinc body measuring 10 mm (0.39 in) in diameter and 30 mm (1.18 in) in length. Its projecting mounting section measures 6 mm (0.24 in) in length and has an 8 mm (0.31 in) connection dimension.

Weighing 0.03 kg (0.07 lbs), the 02030 uses the T2 pencil configuration and is intended for compatible Onan marine generator cooling systems requiring these dimensions. It is supplied as a separate zinc anode without a brass plug.

• Product Code: 02030
• Material: Zinc
• Diameter (Ø): 10 mm (0.39 in)
• Body Length (l): 30 mm (1.18 in)
• Mounting Extension (l1): 6 mm (0.24 in)
• Connection Dimension (b): 8 mm (0.31 in)
• Weight: 0.03 kg (0.07 lbs)
• Pencil Type: T2
• EAN: 8033837067306
• Supply: Zinc anode only

Tecnoseal 02031 – Onan Zinc Pencil Anode Ø13 x 26 mm

The Tecnoseal 02031 is a zinc pencil anode featuring a 13 mm (0.51 in) diameter cylindrical body measuring 26 mm (1.02 in) in length. Its mounting extension measures 5 mm (0.20 in) and has a 9.5 mm (0.37 in) connection dimension.

This model weighs 0.03 kg (0.07 lbs) and uses the T2 pencil configuration. Compared with the 02030, it has a wider and shorter zinc body with different mounting dimensions, making it suitable for a different compatible Onan cooling system fitting.

• Product Code: 02031
• Material: Zinc
• Diameter (Ø): 13 mm (0.51 in)
• Body Length (l): 26 mm (1.02 in)
• Mounting Extension (l1): 5 mm (0.20 in)
• Connection Dimension (b): 9.5 mm (0.37 in)
• Weight: 0.03 kg (0.07 lbs)
• Pencil Type: T2
• EAN: 8033837067313
• Supply: Zinc anode only

Tecnoseal 02032 – Onan Zinc Pencil Anode Ø11 x 31 mm M8

The Tecnoseal 02032 features a cylindrical zinc rod measuring 11 mm (0.43 in) in diameter and 31 mm (1.22 in) in length. Its integrated threaded mounting extension measures 9 mm (0.35 in) and uses an M8 connection.

Weighing 0.02 kg (0.04 lbs), the 02032 uses the T1 pencil configuration. The M8 threaded connection allows installation into a compatible existing mounting fitting, while the zinc body provides sacrificial corrosion protection within the cooling-water system.

• Product Code: 02032
• Material: Zinc
• Diameter (Ø): 11 mm (0.43 in)
• Body Length (l): 31 mm (1.22 in)
• Threaded Extension (l1): 9 mm (0.35 in)
• Mounting Thread (b): M8
• Weight: 0.02 kg (0.04 lbs)
• Pencil Type: T1
• EAN: 8033837067320
• Supply: Zinc anode only

Tecnoseal 02033 – Onan Zinc Pencil Anode Ø12 x 40 mm 3/8" UNC

The Tecnoseal 02033 is a zinc pencil anode with a 12 mm (0.47 in) diameter body measuring 40 mm (1.57 in) in length. Its threaded mounting extension measures 10 mm (0.39 in) and features a 3/8" UNC connection.

The anode weighs 0.03 kg (0.07 lbs) and uses the T1 pencil configuration. Its longer zinc body and 3/8" UNC thread distinguish it from the smaller Onan pencil anodes in this range.

• Product Code: 02033
• Material: Zinc
• Diameter (Ø): 12 mm (0.47 in)
• Body Length (l): 40 mm (1.57 in)
• Threaded Extension (l1): 10 mm (0.39 in)
• Mounting Thread (b): 3/8" UNC
• Weight: 0.03 kg (0.07 lbs)
• Pencil Type: T1
• EAN: 8033837067337
• Equivalent Tecnoseal References: 02003, 02027, 02052
• Supply: Zinc anode only

Application and Compatibility

These Tecnoseal zinc pencil anodes are listed for Onan marine applications and are intended for replacement in compatible cooling-water systems and heat exchangers.

• Onan marine generator cooling systems
• Compatible marine heat exchangers
• Replacement of sacrificial zinc pencil anodes
• Existing mounting fittings matching the specified dimensions and connections

Model Selection

Choose the appropriate Tecnoseal Onan zinc pencil anode by comparing the existing component's body diameter, length, mounting extension and connection specification.

The 02030 and 02031 use the T2 configuration, with connection dimensions specified in millimetres. The 02032 and 02033 use the T1 configuration and feature M8 and 3/8" UNC threaded connections respectively.

The four models have different dimensions and mounting arrangements and should not be considered interchangeable without checking the original anode and its installation requirements.

Supply: All models are supplied individually as zinc sacrificial anodes without brass mounting plugs.