SOS British Seagull Engine Identifier

Please note that this is the Beta version and still in testing. If you notice any anomalies, we would be very grateful if you could tell us by emailing John on the address at the bottom of the page. Please remember to include the actual serial number that you used. Thanks, John.
Engine Serial Number:
Data Specific To Serial Number 'AC47401'

Series: The 102 Series

Manufacture Date: 1955 to 1956

'AC' Coded Engines
Years Manufactured 1946 to 1956
Series 102
Model Clutch Drive
Gear Oil SAE or EP140
Picture  
Years Manufactured 1946 to 1957
Model Name 102
Gearbox Clutch 2.5:1
Prop 9 1/2" (Two blade, bow-tie)
Fuel Mix Ratio 8:1
Cylinder Style Long Water Jacket
HP 4
Gear Oil SAE or EP 140
The 102 used the Amal 2 jet carb exclusively. However, the replacement if it failed, in later years, was the 416, so some may have been changed. Strangely enough that carb will run reasonably happily on 10:1, which older, pre 1968, motors should run on. John, SOS.
Engine Size 102cc
Click here to contact Charles at the Marston Registry for details of spares and technical info.

Engine Boat Type & Size
HP* 4
Model Century/Century Plus/75/Curlew
Vessel Type/ Size As a second motor for a motorboat or on 14 to 19 foot heavy dinghies.
*HP represent the manufacturers HP model number. Since British Seagulls are rated in foot pounds the actual horse power rating may not be entirely accurate to the numbers listed. (33 foot pounds = 1 HP) Sealed box British Seagulls can be recognised by an extra screw in the gear box casing just above the top gearbox cap screw. This screw secures the bearing assembly. Note! The Hp ratings are very approximate! Later investigations proved they were wildly inaccurate, and the thrust at the prop became more important and was the figure used to denote models, ie the Featherweight become the 45, the EFNR the 90. John, SOS

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