Sierra Clutch Housing Seal Kit 18-2698, Interchangeable with GLM 87660, for OMC Outboards 170-200 HP

The Sierra 18-2698 Clutch Housing Seal Kit is a complete gasket and O-ring set for servicing the clutch housing on OMC outboard motors. It is built to meet or exceed original equipment quality, giving a reliable seal at the clutch housing during a gearcase rebuild or routine maintenance. The kit bundles every small gasket, washer, and O-ring needed for the job into a single part number, so installers do not have to source each seal individually.

Inside the kit you get one 18-0939 upper gearcase dipstick gasket, one 18-2863 tilt clutch cover gasket, one 18-4248 drain plug washer, one 18-7114 O-ring, one 18-7400 O-ring, and one 18-7952 O-ring. Sierra 18-2698 is interchangeable with GLM 87660, making it a straightforward replacement for that part number as well as the original OMC clutch housing seals. The kit applies to OMC outboard motors across a range of horsepower ratings, including 170, 175, 185, and 190 HP models from the listed model years below.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2698
• Product Type: Clutch Housing Seal Kit
• Application: OMC Clutch Pack Seal Kit
• Color: White
• Weight: 0.08 pounds
• UPC: 808282106096
• Kit Contents: (1) 18-0939 Upper Gearcase Dipstick Gasket, (1) 18-2863 Tilt Clutch Cover Gasket, (1) 18-4248 Drain Plug Washer, (1) 18-7114 O-Ring, (1) 18-7400 O-Ring, (1) 18-7952 O-Ring
• Interchange Number: GLM 87660

Fitment

• OMC outboard, 170 HP, 1974
• OMC outboard, 175 HP, 1975-1977
• OMC outboard, 185 HP, 1967-1968
• OMC outboard, 185 HP, 1978
• OMC outboard, 190 HP, 1974-1977

Replaces (OEM)

• GLM 87660

Frequently Asked Questions

What does the Sierra 18-2698 Clutch Housing Seal Kit include? The kit contains one 18-0939 upper gearcase dipstick gasket, one 18-2863 tilt clutch cover gasket, one 18-4248 drain plug washer, one 18-7114 O-ring, one 18-7400 O-ring, and one 18-7952 O-ring, all needed to reseal the clutch housing in a single package.

Is GLM 87660 the same as Sierra 18-2698? Yes, Sierra 18-2698 is interchangeable with GLM 87660, so it can be ordered as a direct replacement for that number.

How much does this seal kit weigh? The Sierra 18-2698 Clutch Housing Seal Kit weighs 0.08 pounds.

What color are the components in this kit? The components in the Sierra 18-2698 kit are white.

Which OMC outboard motors use the 18-2698 clutch housing seal kit? This kit fits OMC outboard motors including 170 HP (1974), 175 HP (1975-1977), 185 HP (1967-1968 and 1978), and 190 HP (1974-1977) models.

Is Sierra 18-2698 an OEM or aftermarket part? It is an aftermarket kit manufactured by Sierra that is built to meet or exceed original equipment quality.

Does the 18-2698 kit include the drain plug washer? Yes, one 18-4248 drain plug washer is included along with the other gaskets and O-rings in the Sierra 18-2698 kit.

How many O-rings come in the Sierra 18-2698 kit? Three O-rings are included: an 18-7114, an 18-7400, and an 18-7952.

What is the tilt clutch cover gasket part number in this kit? The tilt clutch cover gasket included in the Sierra 18-2698 kit is part number 18-2863.

Can I use the Sierra 18-2698 kit to service just the dipstick gasket? The 18-0939 upper gearcase dipstick gasket is included as part of the full Sierra 18-2698 kit, which is sold as a complete set rather than individual pieces.