Can I run a short shaft motor on a 20 inch transom?
zike Elite Refuge Member. If you set the motor back far enough without jacking it up, a short shaft will work on a 20″ transom. Never argue with idiots as they will do nothing but bring you down to their level and then beat you with experience.
Is a 20 inch transom a long shaft?
Generally, short shaft outboards are 15 inches, long shaft outboards are 20 inches, and extra-long outboards are 25 inches. Small portable outboards ranging from 2 to 20 horsepower are usually sold only in short or long shaft versions. High powered boats usually only come in long and extra-long variants.
How long is a short shaft transom?
Shaft Length Recommendation
|Transom Height||Shaft Length|
|30 cm / 11.8 inches – 40 cm / 15.7 inches||Extra Short*|
|40 cm / 15.7 inches – 50 cm / 19.7 inches||Short|
|Higher than 50 cm / 19.7 inches||Long|
How do you tell if your boat needs a short or long shaft?
Measure from the top of your transom to the bottom of your keel. If it is from 15″ to 17″ long you’ll need to get a Tohatsu outboard with a “short” shaft. If it is from 20″ to 22″ long you’ll need our “long” shaft outboard.
What happens if you put a short shaft motor on a long shaft boat?
RE:Long shaft, short transom Aside from losing several inches in draft, using a long shaft motor where a short shaft should be fitted will most noticeably effect your top end speed. You may also notice steering problems and will have a reduction in fuel economy.
How do you measure the transom height of an outboard motor?
The height of the transom is calculated by measuring from the bottom of the hull to the top of the transom, using the center line.
Can I put a 25 inch shaft outboard on a 20 inch transom?
My experience with 25″ engines on jackplates on a 20″ transom has been fine. It seems like a benefit to have the engine parts up 5″ higher from the water, and I like jackplates (have them on both boats).
Can you put a 25 inch outboard on a 20 inch transom?
Sorry for the confusion. It is possible to mount a 20-inch shaft outboard motor on a transom designed for a 25-inch shaft motor, however the lower unit will be mounted too high and performance will suffer.
How do you measure transom height?
The height of the transom is calculated by measuring from the bottom of the hull to the top of the transom, using the center line. On most newer center consoles and offshore boat transoms might include a rear door leading to a swim platform as well as a molded setback bracket.
What size motor do I need for a 20 foot fiberglass boat?
Center console boats from 20′-25′ can usually perform well with a single outboard from 200 to 300-hp, depending on load and top speed expectations. Over 25′-26′, twin engines are typically recommended.
How far below the boat should the prop be?
If you have a short shaft motor, the top most part of the transom and the lower most part of the boat should be about 15 to 16 inches. For a long shaft, I think 20 to 21 inches is correct.
Do I need a short or long shaft outboard?
The correct length for the outboard engine drive shaft is determined by the height of your boat’s 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.
How to measure outboard motor shaft length [long V short]?
– Short shaft–15 inches – Long shaft–20 inches – Extra-long shaft–25 inches – Extra-extra long shaft–30 inches
What is the shaft length of an outboard motor?
Outboard motors can be fitted to a variety of boats, so manufacturers have standardized their engines to go on virtually anything. 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.
What is a long shaft outboard motor?
The outboard shaft length is the vertical distance between the top of the mounting clamp bracket and the bottom of the cavitation plate (aka the ventilation plate). Here is a picture that shows you exactly where the outboard motor shaft length stands: Usually the shaft length for outboard motors falls into the following 4 sizes: Short Shaft: 15’’ Long Shaft: 20’’ X-Long Shaft: 25’’ XX-Long Shaft: 30’’