Sierra Air Filter 223-1101 for Westerbeke Generators, Replaces 39705

The Sierra 223-1101 is a replacement air filter engineered for select Westerbeke generator sets. It fits inline in the intake path to trap airborne dirt and debris before they reach the engine, protecting internal components and helping maintain steady generator performance in the marine environment. The filter is built as a direct replacement for the original Westerbeke 39705 filter, so it installs using the same mounting configuration as the part it replaces, with no modification needed.

This filter is intended for Westerbeke generator models rated 8.0 BTDA, 10.0 BTDA, 12.5 BTDB, and 15.0 BTDC (at both 50Hz and 60Hz operation), covering a common range of onboard generator output classes. Each unit ships as a single filter (quantity of one) and is backed by Sierra's standard customer satisfaction warranty covering defects in workmanship and materials.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 223-1101
• Product Type: Air Filter
• Category: Westerbeke Generator Parts
• Replaces (OEM): 39705
• Quantity: 1
• Weight: 0.8 pounds

Fitment

• Westerbeke 8.0 BTDA (60Hz) / 6.0 BTDA (50Hz)
• Westerbeke 10.0 BTDA (60Hz) / 7.5 BTDA (50Hz)
• Westerbeke 12.5 BTDB (60Hz) / 9.4 BTDB (50Hz)
• Westerbeke 15.0 BTDC (60Hz) / 12.0 BTDC (50Hz)

Replaces (OEM)

• 39705

Frequently Asked Questions

What does the Sierra 223-1101 air filter fit? The Sierra 223-1101 air filter is designed for Westerbeke generators rated 8.0 BTDA, 10.0 BTDA, 12.5 BTDB, and 15.0 BTDC, at both 50Hz and 60Hz operation.

Is the 223-1101 the same as OEM part 39705? Yes, the Sierra 223-1101 is a direct replacement for the original Westerbeke 39705 air filter and installs in the same location without modification.

How many filters come in a package? Each Sierra 223-1101 order includes one air filter (quantity of one).

How much does the air filter weigh? The Sierra 223-1101 air filter weighs 0.8 pounds.

Will this filter work on 50Hz generator models? Yes, the 223-1101 covers both 50Hz and 60Hz versions of the listed Westerbeke BTDA, BTDB, and BTDC generator models.

Does Sierra offer a warranty on this air filter? The Sierra 223-1101 is covered under Sierra's customer satisfaction warranty, which covers defects in workmanship and materials for the useful life of the product.

Can this filter be used as a genuine OEM replacement rather than an aftermarket substitute? The 223-1101 is manufactured by Sierra as a replacement part designed to meet or exceed the performance of the original Westerbeke 39705 filter it replaces.

What generator series is compatible with part number 223-1101? Part number 223-1101 is compatible with Westerbeke's BTDA, BTDB, and BTDC generator series at the specific ratings of 8.0, 10.0, 12.5, and 15.0 (60Hz) or their corresponding 50Hz ratings.

Is installation of the 223-1101 straightforward? Because the Sierra 223-1101 is a direct replacement for the Westerbeke 39705, it fits the original filter housing without requiring any additional parts or modification.

What OEM number should I search if I only have my old filter's part number? If your old Westerbeke generator filter is marked 39705, the Sierra 223-1101 is the replacement to order.