Specifications for a 1988 Evinrude 4HP Outboard

Updated July 19, 2017

Founded by Ole Evinrude in 1909, Evinrude Outboards is now owned by Bombardier. Evinrude offered over 24 different outboard engines in 1988. The Evinrude 4DLX, one of two 4-horsepower engines released that year, was available in both standard and long lengths. The 4-hp Excel 4 outboard was available in standard, long and a third model designed for 2.5hp operation.


Both the 4DLX and the Excel 4 feature manual starting with auto-rewind. With manual tilt and trim, and a single carburettor, both engines include variable volume centri-matic pump cooling systems. A stop button kill-switch is integrated into the tiller handle.


The Excel4 and 4DLX were inline two-cylinder engines displacing 86.4 cubic centimetres. Both engines could generate 4hp at 5,000rpm. The Excel 4-2.5 could produce 2.5hp at 4,500rpm. Evinrude recommended a wide-open-throttle operating range of 4,500 to 5,500 for the standard and long variants of both engines. The Excel 4-2.5 had a wide-open-throttle range of 4,000 to 5,000.


The prop length of the 4DLX standard was 15 inches and was 20 inches for the long; each engine weighed 50 and 238kg, respectively. The Excel 4's three variants (standard, long and 2.5) had prop lengths of 15, 20 and 15 inches and weighed 35, 37 and 32lbs.


All versions of the 4DLX shipped with an 8 by 7-inch three-blade aluminium propeller. An optional 9.6 by 6.5 aluminium propeller was also available. The Excel 4 engines came with a 7.5 by 7-inch plastic propeller. Excel 4 engines could upgrade to either a 7.5 by 6-inch plastic propeller or a 7.5 by 6.5-inch aluminium propeller.

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Based in Boston, Christopher Rogers has been writing arts and technology articles since 1995. His work has appeared in "The Boston Book Review" and on HappyPuppy and Rogers was a visiting James Joyce Scholar at Shakespeare & Company's Bloomsday celebrations in Paris. He has studied psychology, comparative literature and philosophy.