See full version: How to Measure a Long or Short Shaft Outboard Engine
An outboard might come equipped with a short shaft, a long shaft or an extra-long shaft, the shaft being the driveshaft that connects the powerhead -- the engine -- to the lower unit, where the propeller shaft, the propeller and the forward and reverse gears all live. Driveshaft lengths are standard throughout the boating industry. A short shaft is 15 inches long, a long shaft 20 inches long and an extra-long shaft 25 inches long. [links]
Measure from the bottom of your outboard's engine compartment down to the bottom of the cavitation plate -- the horizontal metal wing above the propeller. If the measurement lies between 19 and 21 inches, it's a short shaft. If it's about five inches longer than that, it's a long shaft. If it's about 10 inches longer than the short shaft's 20 inches, it's an extra-long shaft.
Drivers: A standard driver measures in at forty-five inches in length here
We’ll teach you how to correctly size your clubs, before you buy, ensuring you’re using the right length of clubs for your size based on your height and playing style.
If you already have a set of golf clubs and want to know how long your clubs are, you can easily determine their length by following the measuring technique below. more
By now you know that the length of your clubs can have a major impact on your performance. If you’ve struggled with accuracy and control out on the course, it may not be poor technique, you may just be playing with the wrong club size. However, beginners don’t often know the importance of golf club measurement and how a longer club can improve range and a shorter club can improve control and accuracy.
On average, most golfers use a driver that’s forty-four inches in length, however, a club shaft up to forty-eight inches in allowed for competitions. [links]
An Online Magazine for DIY Hot Rod Builders here
The quick and dirty way to determine if you have a long or short water pump is to try and stick your fingers behind the timing cover, you can not with the short pump.
Roadkill Customs has evolved from local hot rod shop to online how-to magazine for budget-minded do-it-yourself hot rod builders and enthusiasts. more
We provide how-to and technical articles, vehicle and build features and examples, plus calculators and lookups that will help you get your ride from dream to driver. You bring the gumption.
A more accurate way is to measure the shaft, a SBC long water pump shaft is 7″ and a short is 5 5/8″ — a BBC long water pump shaft is 7 1/4″ and a short is 5 3/4″. [links]
I've had this old merc for years but am now selling it. And a guy I
bumped into asked if it was long or short shaft since I didn't have the
motor with me. I don't know? What is the difference? What do I
measure? more
Measure from the point where the mounting bracket contacts the top of the
transom (where it hangs from) to the cavitation plate directly above the prop. more
Short shaft is 15 inches
Long shaft is 20 inches
Extra long shaft is 25 inches