For daysailers and short one-design racing sailboats, it depends on the position of the outboard mount. Mounting clamps (the point which actually sits on top of. I can say for certain, that adding transom height would cut down on the manufacturers max HP rating for your boat. Motors, identical except that one is a 15 inch engine, and the other. Boats that use short shaft outboards include: - Pontoon boats (many can be used with a long shaft as well). Country: UK - Channel Islands. Ideally, you want the outboard's cavitation plate, also called the anti-ventilation plate, to be at the same level as the bottom of your hull. Short shaft–15 inches. Shown here are photos of two 1957 Johnson 18 hp outboard. This will help ensure it is outside the hull's water turbulence and prevent the propellor from cavitating.
Even at 3" there would be more serious modifications needed than a spacer on the top of the transom. First thing you need to do is measure your transom from the top of the outboard mount to the keel. The boat builder might know. If you'd like to see this in video format, skip to 0:44 in the below YouTube Video: FAQs About Outboard Shaft Length. At a later point in time, when it become apparent that increased. Click HERE for full size view. If our canoe has a 17" transom and draws 3"-4", which is typical for most canoes but depends on the load, then we would have 13"-14" of transom sticking above the water level at displacement speeds. 5 cm) long shaft outboard. Some boats are equipped with transom-hung outboards while others have a bracket. In either case, a dialogue with the craft's designer is. A short shaft is 15 inches long, a long shaft 20 inches long and an extra-long shaft 25 inches long. You intend to obtain your outboard motor.
Long shaft–20 inches. I think I know what I am looking for now, thank-you! I use a short shaft Susuki 2. Thanks for all your replies, how can I find the individual that has the 25hp 4 stroke on a 14 ft lund? To be mounted on a boat transom measuring 15 inches in height.
Plate depth under water is still important parameter - thanks for noting this. For boats equipped with a bracket, calculate the same measurement but based on the bracket and not the transom. If you own a motor and you are looking for an inflatable boat to mount it onto, it is important to know the specifications of your motor, especially the length. A: The short answer is – Yes. Presumably if I'm thinking of buying a small auxiliary engine for my boat it will need to be long shaft right? Those v4 Yamahas as superb engines and mine ran for 14 years without problems. The big Mercury 90hp and up still made in USA.
Johnson / Evinrudes (OMC) are the easiest to convert shaft length. Easy to carry, easy to store, easy to use. If you go boating in the ocean or deeper lakes, you'll have to worry less about running aground, and you can attach a longer outboard shaft to your boat. The dealer just hit you with the long or short shaft question and you have no clue as to what you need or even what he's talking about. Location: East Riding of Yorkshire. For slower boats, it's less critical to. I will ask my service guy about your hot spot concerns and report back.
Twin Outboards on Small Boat – Key Facts. Sailboats and small Jon boats. It is mounted on the side at gunwale level just behind the back seat. Sailboats with movable brackets. A 15 inch transom can usually be modified to a 20 inch transom with. Since the length of the shaft of your outboard is associated with the size boat, smaller engines will generally have shorter shafts.
I have an Oday 20 with a short shaft 7. For boats with the transom height higher than 50 cm / 19. MMSI Number: 235900806. Most outboard motors that are short shaft are 17 inches from the secure point on the outboard to the bottom of the shaft. Highly reliable thanks to a first in class oil filter. 4 cm) shaft length, the only compatible long-shaft electric outboard motor would be the EPropulsion Spirit One Plus. NO modification are needed.
A propellor generates a positive (high pressure) water pressure in the front of the blade and a negative (low pressure) on the back of the blade. Pontoon boats (depending on the boat size). The force of leverage would most definitely be increased. The transom height is the distance from the beginning of the clamping plate to the bottom of the hull's center. On my dinghy in Croatia I would simply find that a longer leg means that I hit the stony bottom more often but I guess it depends upon what kind of vessel the outboard is attached to and where you are using it? Hi I have a Yamaha Malta 2 stroke that runs on 100/1. You reply, "Im not sure, I think its a long". Boat Make: Mercury Ocean Runner 420. Of just what is available in one's particular area. The following lists the shaft length of some popular electric outboard motor manufacturers. Trolling motors are slightly different in the measurements required to make a correct purchase. Early days of outboard motors that they would, generally, be designed. Engine: Yamaha 60ETO, Tohatsu 3. The shaft length should be 28.
Just measure the distance between the motor mount and the water surface. Read June's issue of Motor Boat Monthly, right up on What Auxiliarys to have. That's why I think the relationship between the plate (and the prop below it) and the water's surface is probably more critical than it's relationship to the bottom of a small canoe transom. New plant they built in USA state of the art. Look's like no formal introduction is required.
1989 Evinrude Sail Master. If you take a wave on board, or fill up from the cowes barge after a storm, it's quite likely that the main engine failure is from water in the fuel. So extending it from 17 inches to 20 inches. "Modern era" boats are designed with the 4 stroke weight already factored in because you can't buy new, small 2-stroke motors anymore. Experienced boaters will often discard the manual since they already have everything at their fingertips. In any case, that 2. Joined: Sun Apr 29, 2007 12:59 pm.