What is the difference between long and short shaft outboards

Select the correct shaft length. I havent had the sail boat in the water yet trailer issues but I have used the motor.

A short-shaft outboard has a drive shaft thats 15 inches long.

What is the difference between long and short shaft outboards. Long Shaft Extra Long Shaft and Short Shaft Outboard Motors. As you can tell from the diagram and photo the shaft length is from the top of the mounting clamp bracket to the bottom of the cavatation plate. THE SHAFT LENGTH IS NOT FROM THE BOTTOM OF THE POWERHEAD ALL THE WAY TO THE BOTTOM OF THE SKEG THAT MEASUREMENT IS USELESS.

Updated 3 years ago Author has 187K answers and 176M answer views. Short shaft motors are typically used on vessels with a low transom such as inflatables and small tenders. Longer shafts are required where the transom is higher such as sea-going craft.

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.

Generally short shaft outboards are 15 inches long shaft outboards are 20 inches and extra-long outboards are 25 inches. Since the length of the shaft of your outboard is associated with the size boat smaller engines will generally have shorter shafts. Bought my dad two identical 1978 Merc outboards - 99 HP.

The one that runs well has a long shaft. The parts motor that does not run has a short shaft. At purchase 400 for both I did not know his.

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. Anything bigger than that your obviously going to need an extra long shaft.

Generally a the difference between a short shaft and long shaft is 5 in length. If you dont raise it you will be dragging alot more water and wont get the full power out of your motor. You must log in or register to reply here.

While the short block focuses on the engine block and bottom end rotating components the long block goes further by adding components that mechanically complete the. A short shaft is 15 inches long a long shaft 20 inches long and an extra-long shaft 25 inches long. Short or Long – or Extra Long.

Measure from the bottom of your outboards engine compartment down to the bottom of the cavitation plate – the horizontal metal wing above the propeller. A short-shaft outboard has a drive shaft thats 15 inches long. Long-shaft outboards have a 20-inch drive shaft.

The extra-long shaft is 25 inches long. Short Long Shaft motors Hi everyone. New here but I have something to ask.

Ive read a few of the comments about the use of long shaft motors on short transoms. I have a long shaft Suzuki DT2 motor that I got with the Nordica 16 I purchased last spring. I havent had the sail boat in the water yet trailer issues but I have used the motor.

When an engine is referred to as a short shaft its considered to be a 15 motor. Long shaft is considered 20. An XL shaft is 25.

In rare cases mostly in big saltwater models engines were made in a 30 shaft or an XXL. In none of these cases is the shaft length exactly 15 20 or 25 inches. The smoother and sweeter the longer the inner will last and there will be smoother and more responsive steering.

Some of the short shaft motors of old much smaller Hp normally were steered using a wire cable system usually nicknamed a washing line system and this does not need the same motor height generally as the cablerod system. By measuring the exhaust housing between the powerhead and where the gearcase bolts on. A shortshaft engine will have an exhaust housing length of approximately 15 in.

The longshaft engine will measure 20 in. 2002 2275 RL twin 25 tubes. 2005 Mercury 115 EFI 4S.

If it is a long shaft it will be fine no jack plate needed. Unless you going in shallow water like 3-4 inches deep just tilt the motor up and get in close with the boat it how we do it pike fishing on st Clair some guys even got poling platforms on their boats. As long as your in deep enough water to run the motor your fine just remember it is a long shaft and keep a eye on it.

When in close to shore or going. Post by Blueboy5000 onAug 12 2012 at 918am. If a gy6 150cc has 10 wheels its a shortcase.

There are plenty of retro style 150cc that use 10 wheels. The gy6 50cc also comes in long and short. The 50cc with 12 wheels like the King Ghring Ruckus clone uses a long case.

The longcase and shortcase 139qmb both say 139qmb on them. Many small engines 10HP or less have shafts around 175 long 45 cm. Outboards sold for sailboat propulsion often have an unusual long shaft for their size.

Very large engines 250 HP or more can have 30 long shafts. From here I switch to inches only as units. 1 25 cm.

Select the correct shaft length. When selecting a shaft length we must start with the location. OUTBOARD MODEL CODES 1984 TO 1990 CODE GUIDE 150 Prop Shaft Horsepower E Electric Start T Power Tilt or Power Trim Tilt L Lower Unit Shaft Length D Model Year Examples 99 15 200 S 15 UR Short l 20 UR long X 25 UR Ultra long J Jet Drive lower Unit UR User Required n 1984 k 1985 J 1986 h 1987 G 1988.

Due to the longer production run long water pumps hold the distinction of having more accessory brackets pulleys and other hardware available for them but obviously the short pump will save you roughly 1-38-inches 1375-inch of room which in a cramped hot rod engine bay might be just what you need to have your fan clear the radiator or your water pump pulley clear your electric fan. When measured from the transom to the centre of the propeller the short shaft version is 625 cm long while the long shaft version measures 755 cm. The shaft on Torqeedo outboards is longer than on petrol-driven outboards owing to the larger more efficient propeller but the motors are used for the same areas of application.

Say the 20 shaft is a long shaft length for gas engines but it is a short shaft length for electric outboard motors. And thats usually the case since the electric outboards are designed with larger and more efficient propeller that needs longer shaft. A short block engine is usually cheaper than its long block counterpart.

As of 2021 a long block engine costs anything between 1500 and 5000 while short block prices are around 1000 to 3000. The price difference also depends on the make model and year of the car the engine is designed for. However a short block engine requires.