What length outboard shaft do i need

The shaft dimension depends on the size of the boats engine. It is a 1973 boat.

How Important Is the Length of the Shaft.

What length outboard shaft do i need. 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.

For mid-range engines the most common shaft length is 20 508 mm. 15 shafts should be reserved to protected waters. 25 shaft are rare below 100 HP.

Other shaft lengths exist. 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.

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. 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 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. 14 1725 15 Shaft Short 1725 195 Varies by application.

195 225 20 Shaft Long 225 27 25 Shaft Extra-Long. Choosing a Short Long or Extra Long Shaft Outboard Motors. You must measure your transom in order to determine what shaft length motor you need.

Keep in mind that the cavitation plate should be flush with the bottom of the boat. You can get away with an inch or two either way but it is wise to keep it close. So if you are measuring the outboard shaft length for the powerboat planing boat or any boat for which the speed is the priority take the outboard shaft length 1 to 15 depending on your boat types shorter than standard would be better.

If it is from 20 to 22 youll need a long shaft outboard. TohatsuNissan outboard shafts are measured from the bottom of the engine mounting clamp bracket to the cavitation plate large fin above propeller on the lower unit - see diagram below. Generally most boats need either a short or long shaft although some boats require a 25 ultra-long shaft outboard.

Short shaft is 15 inches standard is 20 inches and long shaft is 25 inches. Normal is generally the 20 inch. I would not use a short shaft on any trailerable unless it is the smaller engines on small daysailors depending on the transom height of the outboard motor bracket.

Outboard motor shaft length guide - YouTube. 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. Its generally a measurement that falls closest to the number.

What length of outboard shaft do I need. 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.

Motor Shaft Length with 20 Transom Need Advise Please. By JL8Jeff 06 Aug 2017 2338. I measured my transom at 225 right next to the tunnel.

The tunnel is 25 - 3 and the motor is sitting 25 above the top of the transom. So you would need the 15 short shaft with the 20 transom or you would need a riser plate to lift it 5-6. Shaft length for a 13 ft whaler.

It measures 17 inches. The motor i have is 20 inches thats whats going to make me buy the boat or not. Whats a boat like that worth.

Needs paint interior and exterior and wood replaced. Some fiberglass work in some areas no holes etc. It is a 1973 boat.

Could a jack plate be used. Or a spacer added. 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 It should use a 20 shaft. Posted 02-10-2008 1257 AM ET US.

HI jonboatbassin The motors short 15 og long 20 shaft is designed to each their transom height. Mesure your boat from the over edge of the transom where the motorbracket rests and to the buttom of the keel at transom. How Important Is the Length of the Shaft.

When choosing your shaft length its very important. As each size depends on how powerful your boats engine is. The shaft dimension depends on the size of the boats engine.

If your boat has a small engine then youd need a short shaft. High powered boats would need shafts that are either long or extra long in. Actual shaft length is 215 on those.

Gear case sits just below or at the hull depth due to the deep v. It also sits back a bit off the platform which must help. In other words the outboard motors shaft length should be equal to the length of your boats transom.

This is not an exact science. Being an inch off either way is no big deal and will have very little if any effect on the boats performance. First would be the logical thing and spend the extra 300-700 when buying a motor and get an 99hp XL shaft 25 and solve the problem.

Second thing to do would be to get one of those adjustable kicker brackets and bolt it onto the back and just get a 20 shaft motor. Allowing for raising and lower in varied water conditions and depths. Selecting The Proper Trolling Motor Shaft Length Is Critical Determining the proper trolling motor shaft length is one of the key aspects of finding the right motor for your boat.

It will help ensure that the motors shaft is long enough to keep the propeller submerged at least 12 below the water line in your specific. CHOOSING THE RIGHT SHAFT LENGTH. This is dictated by depth of your boats transom as measured from top to bottom in the centre.

If your boat is about 15-16 you will need short shaft and if it is 20-21 you will require long shaft.