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Author	Topic:   Deducing Shaft Length From Motor Model Designator
comert	posted 12-22-2008 09:56 AM ET (US)         My motor is a 1977 Johnson 85 hp model 85ETLR77. What to the numbers mean? I'm looking for a water pump kit, but don't know if I have a 20" shaft or a 25" shaft? Any help. Thx TC
Newtauk1	posted 12-22-2008 10:14 AM ET (US)             This link might help you. www.marineengine.com/manuals/johnson/models_1980-present.gif
Tohsgib	posted 12-22-2008 12:43 PM ET (US)             ETLR77 means Electric start, Trim, Long shaft 20", remote, 1977. Kit would be the same on either size shaft but I don't think they made a 25" 85hp.
jimh	posted 12-22-2008 03:52 PM ET (US)             It is generally almost universal that the letters "L" or "X" are used to designate the shaft length in an outboard motor model designator, with "L" meaning a long shaft or 20-inch shaft and "X" meaning an extra-long shaft or a 25-inch shaft. When you have a motor available for measurement, you can deduce the shaft length by simply measuring the distance between the mounting bracket and the anti-ventilation plate. In an article in the REFERNCE section http://continuouswave.com/whaler/reference/engineMountingHeight.html there is a diagram that shows how to take the measurement. Deduction of the shaft length from actual measurement avoids any possibility of confusion or misinterpretation of the model designator coding that was used.

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