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Measure from the top of your transom to the bottom of your keel. If your boat has a Transom Height 15-16 you will need short shaft and if it is 20-21 you will require long shaft engine.
Outboard Shaft Length Transom Height - Factors The Factors indicates the adjustment affected by on your boat type the outboard working environment and the transom distance as discussed above.
Outboard shaft length transom height. A long shaft engine requires a height of 20 and extra-long shaft engines will need a transom height of 25. While this is the case there is certain saltwater motors that are extra extra long at 30 and 35 shaft. Keep these numbers in mind if you ever have a need for a new outboard motor for your boat.
The buyer is supposed to be aware about the boat measurements as it helps in deciding the best transom height. For short shaft engines the transom height should be of 15 inches for long shaft the height should be of 20 inches and for extra-long shafts the transom height is supposed to be around 25 inches. Outboard shaft length vs transom height.
I just bought a little home built skiff for my wife a 135 ft Dark Water by Gator Boats. The distance for the keel to the top of the transom is 175 in. The boat came with a long shaft 20 in 99 Evinrude The gator web site says HP up to 20 It wouldnt plane.
For boats with the transom height higher than 50 cm 197 inches a long shaft version is more suitable. For daysailers and short one-design racing sailboats it depends on the position of the outboard mount. If you choose Spirit 10 we suggest you keep the outboard mount at a lower position so XS will work.
Measure from the top of your transom to the bottom of your keel. If it is 15 to 17 youll need a short shaft outboard. If it is from 20 to 22 youll need a long shaft outboard.
Just wondering what the transom heightshaft length was on the original 195 glasply cuddys. Measuring up 20 from the keel on mine would put a hypothetical outboard transom mount only a couple of inches above the waterline. That seems low to me even with a splashwell.
Any advice greatly appreciated. You can order an outboard in lengths ranging from 15 inches to 30 inches depending on its power output and possible uses. Generally short shaft outboards are 15 inches long shaft outboards are 20 inches and extra-long outboards are 25 inches.
Older motors measured 17-18 inches were short shaft for a 15 inch transom new short shaft measure 15 inches. Older long shaft measured 22-23 inches to the plate new motor measure 20 inches for a 20 inch transom. The web-site lists the HBs stern height as 225 but doesnt mention what the actual transom heights is are.
Most outboard motor shaft lengths are listed as. Short 15 Long 20 XL 25. Measure your transom from top where motor sits to the bottom center.
Will either be in the 15 inch short shaft or 20 inch long shaft. The motors are measured from where they sit on the transom to the flat plate just above the propeller. 15 inch is short shaft 20 inch is long shaft there are 25 and 30 inch inch shafts.
S Shawn Bertsch Recruit. Transom is 16 12 Long or short shaft. General rule is the cavitation plate should be even to 1 inch above the bottom of the boat.
More info on motor and boat would be more helpful also. These specific motor lengths were agreed upon by engine and boat builders in the 1960s to create standardization in the industry. The motor length corresponds to the transom height of the boat measured from the keel to gunwale at the transom.
The clamp bracket is designed so that the engines mounting height on the transom can be adjusted. To do so you will want to measure at the exact center of the transom from the very top to the very bottom. If it measures 15 or with in a inch of that you will need a short shaft outboard.
If it measures anywhere from 17 to around 22 then your going to want to go with a long shaft motor. Outboard Shaft Length Transom Height - Factors The Factors indicates the adjustment affected by on your boat type the outboard working environment and the transom distance as discussed above. Outboard Shaft Length Chart.
Some outboards have a serial number that tells you which shaft length to go for. The correct length for the outboard engine drive shaft is determined by the height of your boats transom as measured from top to bottom in the centre. This distance is generally referred to as the Transom Height.
If your boat has a Transom Height 15-16 you will need short shaft and if it is 20-21 you will require long shaft engine. I would contact places which sell used parts such as Tims Outboard Tell him what you have and he can probably fix you up with all the pieces you need to convert your motor to a long shaft. The difference in transom heights for this age motor is 5 inches.
Standard heights were 20 inches and 15 inches. Transom height Yes longshaft transom is 20 inches but it is vertical and not down the transom face. If the boat has a speed above say 30 MPH and uses a good cupped prop then you should be able to run higher ie you need to cut to more than 20 inches high.
My transom is a short shaft and it is 16 to 17 inches wide. A short shaft outboard is truly never 15 inchesthey are always 17 inches so its misleading. You need a short shaft a long shaft is way to long unless you plan on using a jack plate but you definitely need a short shaft.
8 posts Page 1 of 1 Return to Motors Jump to. A long shaft outboard is usually 20 inches 500mm from top of transom bracket to bottom of cavitation plate. An extra long shaft outboard is usually 25 inches 625mm from top of transom bracket to bottom of cavitation plate.
As you will see the 15 standard shaft length is only an average Copied slightly modified from Nissan internet info page One method of making this height fit is to add a Jack Plate as seen in the photo below Here someone cut down the transom 2 12 so adding a Jack Plate was a simple method of getting a correct adjustment without added expense. What is the recommended shaft length for an outboard on a 1980 17 Montauk. Any tips or things to consider when re-powering.
Posted 02-09-2008 0958 PM ET US. Boats with extended transoms brackets that extend the mounting bracket for the outboard motor behind the back of the boat can use a higher outboard height. The brackets can add 1 inch to the overall mounting height of the outboard.
The standard shaft length for most outboard engines less than 125 horsepower is 20 inches.