Originally Posted by willk
A query: which length do people generally mean when they refer to "Standard" shaft? 20"? I've seen the term on here a few times but couldn't match it to a specific size range in the posts? Is there a common sizing between Short and Long that I've missed
Sensibly, starting in the middle, with longshaft
Longshaft is for a 20" - 21" transom. Planing type motors are 20" from the underside of the saddle to the cav plate. Smaller hp motors, eg auxiliaries are 23", giving the prop more 'bite' under the transom.
Standard shaft (often mistakenly called short shaft) motors are 5" less than their longshaft brethren, for 15" transoms.
Extra Long motors are 5" more than the longshaft ones, for 25" transoms
Ultra long motors, sometimes referred to as XXL are 10" more than longshaft, for 30" transoms.
Short shaft are 12" and only likely to be seen on race motors.
I think .......