Contact Us
My Account
Search Over 1 Million OEM Parts
Most parts in stock- Same day fulfillment

Select your engine to find guaranteed-fit parts:

Cylinder Block Gasket 27-991764

Satisfaction rating 5 out of 5 (11 Ratings)
You save $0.80. (3%) $23.79
Ships Immediately
Mercury logo

Product Description

Mercury factory part. Search for more factory parts & parts diagrams.

Product Questions

There are no questions for this product. Ask a new question and receive an answer, directly from our support staff.

11 Product Reviews


Mariner 135 cv

Très bonne boutique réactive et rapide je la recommande


Mercury 2

Experience was good products arrived sooner than I expected. The packing could have been better as gaskets were bent to fit package. I need them urgently. Paid a premium for overseas delivery so it is not cost or time effective to return them. Hopefully this won’t be a problem when fitted. Tracking info was very good. Ray Australia

Excellent simple to use website and customer service is excellent. I would recommend highly. A great online transaction.

Mercury 200l 2 stroke

Repair Difficulty
Repair Time
More than 4 hours
Lovely service, thank you so much for your help.

Problem fixed: Lack of power

Stripe and rebuild engine

2000 Mercury 150 SR6

Repair Difficulty
Repair Time
More than 4 hours
It was great, best shopping experience I have had for the boat motor. easy to find parts, look them up and order. The my garage button is great.

Problem fixed: Complete restoration of the entire motor

Complete motor restoration, complete rebuild, engine block / power head, lower unit, mid-section restoration. Parts breakdown and list has been very useful along with the manual ordered from Crowley Marine.

Great experience excellent customer service A++++++++


Mercury 200 efi



Customers Also purchased

Supersession Chain

Name SKU Superceding SKU
Cylinder Block Gasket VIEWING THIS PRODUCT 991764 CURRENT
Exhaust Plate Gasket 991763 991764
Exhaust Plate Gasket 991762 991763
Exhaust Plate Gasket 99176 991762

Aftermarket Product Interchange

Name SKU Price Brand
Exhaust Plate Gasket 18-2506-1 - Sierra Marine
Due to manufacturer policy OEM Mercury products can only be shipped to addresses within the United States.