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This, in turn, means getting the engine onto the transom of a tender and back again can be fraught with danger�both to your back and to the engine.
Because of this, however, the market in older but well-maintained two-strokes is going through the roof, resulting in many of them being priced close to the level of a much newer four-stroke.
But be warned: these kinds of larger engines are tough to get on and off the mothership without a tackle. Note the gas can inserted in this Lehr propane model. For decades now, gas-powered outboard engines have been the best way to propel a small tender. More recently, one of the biggest changes to outboards has been the move from two-stroke to four-stroke engines, in the interest of reducing exhaust emissions. Despite the extra weight, a four-stroke offers certain other benefits as well.
That said, they also require laying down carefully to stop oil seepage, have more components to fail and are more complicated and expensive to service. In the past, a few companies would sometimes modify certain gas outboards to use propane. However, the modifications were expensive. Then came the U. Propane outboards are much like their regular gas counterparts, only with a different carburation setup and employing a pressurized LPG tank�either a simple screw-in canister in the case of Lehr or a larger remote bottle.
Lehrs can also be run using a remote canister. Over time, propane outboards have proven to be pretty much as reliable and efficient as their gas equivalents at the same time they also emit fewer harmful exhaust gases although they can sometimes be harder to start in extreme weather when the LPG becomes more liquid.
Priced about the same, another advantage over a gas engine is that they never encounter problems with fuel quality, in stark contrast to gas, which now that it contains a large quantity of ethanol biofuel , can block up the fuel filter and carburetor jets after a few months of use.
Not unlike a regular gas outboard with an integral gas tank, a 16oz canister offers around two hours of running at half throttle with a Lehr. This same canister can then be easily changed out on passage. In practice, the main downside of running a Lehr off canisters is you need to source and store on deck or in a suitably designed locker a large number of compatible canisters, as the specific types are not always freely available abroad.
Although you can buy a special adapter that will enable you to refill the canisters from a larger propane tank when on a stable platform, this can be somewhat tricky to do and poses a fire hazard. The lack of a visible indication of fuel remaining in and LPG tank can also be annoying, although as stated, changing the canister on a Lehr outboard, in particular, is quick, clean and easy.
As with most four-stroke gas outboards, you also need to take care how you lie the motor down due to the crankcase oil. Note the screen interface on the handle of this Torqeedo model. Despite it being over a decade since the first feasible and reliable electric outboard was launched, there are still very few that can seriously be considered a viable tender outboard.
Yes, there are hundreds of Asian-built electric trolling motors around, but rarely do they produce more than 0. In addition, few of these smaller motors are genuinely seawater-proof except, maybe, the Minn Kota Riptide range. Then there is the fact that the more powerful models require a large battery that is both cumbersome and tedious to keep charged and stow.
Fortunately, there are now a few electric motors that genuinely make the grade, including German-built Torqeedo, the Chinese-made E-Propulsion range and EP Carry.
All three lines of outboards employ an integral, rechargeable Lithium battery pack that can be removed for charging and, in the case of E-Propulsion and EP Carry, floats. The Torqeedo even has a GPS that shows your speed and distance traveled. In other words, you get what you pay for. Power is also instant, and there is no requirement to warm them up before leaving the dock.
In terms of range�a concern for many�higher-quality lithium-powered models can be discharged much further than a Outboard For Sailing Dinghy 200 cheapy lead-acid powered trolling motor, meaning they can run up to hours at half-throttle with a range of around miles.
Charging times are around 10 hours. Despite recent advances, four-stroke gas outboards remain the standard. Shaft Length: Most small outboards are available with a choice of two or three different length shafts. For the average inflatable, a short shaft is fine. Longer shafts are really designed for high-transomed, rigid fishing craft or small sailboats. Propellers: Manufacturers will offer a choice of props, but usually recommend a relatively shallow pitched one for general tender use.
Sailboat outboards will normally be supplied with a deeper pitch prop for more drive at lower rpm and better displacement when stopping or reversing. Smaller hp motors often only have forward and neutral F-N , requiring you to rotate the entire outboard through degrees to go astern. Throttle: All modern portable outboards now come equipped with twist-grip throttles on the tiller. Electric models also have a forward-neutral-reverse F-N-R selector on the tiller that selects the direction of travel by simply turning the grip clockwise or counterclockwise, with neutral being between the two.
Shallow water drive: Pretty much standard on all small outboards, this feature allows the leg to pop up in the event of a grounding. On a model with a reverse gear this should also automatically lock the leg to prevent it lifting when going astern. What follows are some of the leading outboard brands and what they have to offer up to 10hp now on the market.
Smaller gas-powered outboards like these are the true workhorses of the cruising community. Apart from its little 2. Other features include an internal 0. The fuel pump, filter and carburetor drain are easily accessed, plus they have automatic decompression for easy starting and a low oil pressure monitor with LED indicator that limits revs to 2,rpm.
Improved engine mounts reduce vibration. The large handle and fold-down tiller are ideal for stowage. All made to the same designs and built in Japan, the Tohatsu is the base model for the popular Mercury and Mariner brands, although they offer various different control features. The 2. The 4hp motors and larger have front-shift F-N-R gears, start-in-gear prevention, a remote tank option, through-prop exhaust and low oil-pressure alarm.
It also has F-N-R gears. The larger capacity 8. With auto-decompression start, a remote fuel tank option, thermostatic cooling control and an oil leak prevention system when stowed, they also pack in a lot of nice features.
The lightest of them all the 2. Evinrude offers a small, lightweight 3. The outboards are less sophisticated than some the 6hp, for example, lacks a reverse gear.
But they Dinghy Outboard Size Us are soundly built and easy to maintain. Lerh left has been a leader in popularizing the use of propane in outboards; Mercury right offers the option of propane as well. The first to introduce a dedicated range of propane-powered outboards, the Lehr 2. They both accept either a simple 16oz Coleman-type propane canister or can be connected to a larger remote LPG container.
Other, higher horsepower models are also available. Tohatsu and Mercury have introduced a pre-converted range of 5hp propane outboards that boasts all the features of their regular 5hp gas models and are operated using a remote propane tank.
These electric outboards built by from left E-propulsion, Torqeedo and Electro Paddle are truly up to the rigors of cruising. Divide by 1.
Boating by yourself, you could get about the same performance from a or horsepower motor as you do from a horsepower motor and save fuel. Will Charpentier is a writer who specializes in boating and maritime subjects. A retired ship captain, Charpentier holds a doctorate in applied ocean science and engineering.
He is also a certified marine technician and the author of a popular text on writing local history. Related How to Calculate Canoe Capacity. Items you will need Calculator. Writer Bio Will Charpentier is a writer who specializes in boating and maritime subjects.
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