Home Forums General Weta Stuff Outboard motors and brackets

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This topic contains 7 replies, has 3 voices, and was last updated by Paul White Paul White 1 year, 9 months ago.

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  • #812
    Paul White
    Paul White
    Keymaster

      How do you fit and store an outboard on a Weta?

      Some would say don’t bother as it will always get in the way and in anything above 5 knots of breeze you can move fairly quickly using the sails alone – although sometimes it may help to use the screecher as a “code 0” to keep momentum although you can’t point as high.

      However, there may be situations and regulations that require you to have an outboard but if possible, try one of the options using paddles and oars first.

      Brackets
      There are 3 options I have seen for brackets:
      1. Using a bar (wood or metal) across the stern clamped from gunwale to gunwale with the outboard mounted on a block at the side.

      IMG_0569 IMG_0048-1

      2. Using a metal bracket mounted on the stern which has been reinforced from the inside using a plate inserted by adding an inspection port on the cockpit side.

      image2
      3. Using a hinged bracket attached to a piece of wood inserted into a slot in the stern and then glassed in place  – also requiring an inspection port on the cockpit side.

      outboard+bracket

      All three methods will work although the a bar is easier to fit/remove, can be stowed out of the way when sailing and doesn’t require any holes in the cockpit side. It also means that the outboard is out of the way in most sailing positions if the outboard is not removed while sailing.

      Outboards
      Probably the most important aspect of using an outboard on a Weta is the weight of the engine and where it can be distributed to have least impact on your sailing experience. Having extra weight on the stern is slow in light winds but of course you can counter that with your body weight.

      Then there’s the issue of stowing the engine when it’s not in use. The below deck storage compartment has benefits in that the weight of the outboard is then in the centre of the boat and near the water line. However the compartment below deck is not very deep so careful measurement of the engine and compartment is recommended before purchase, if you plan to stow it below.

      The standard 6″ hatch is too small for any outboard but Kayak hatches offer various shapes and sizes which can be latched shut securely.  The hatch in front of the daggerboard must seal closed because the storage compartment below deck provides buoyancy in a capsize – the boat may not be righted if this is compromised.

      If you are storing a petrol outboard below deck you may need to carry an additional fire extinguisher above deck, depending on your local marine regulations.

      Lying the outboard in the cockpit is an option but it may get in the way when tacking and is liable to catch on ropes.

      Engine options include:

      1. Electric paddle

      IMG_0439

      The electric paddle is different from a trolling motor in that it’s designed for propelling small boats rather than just moving quietly after fish. It has a brushless electric motor which outputs 30Wats of power, but unlike a trolling motor, it uses a “model aeroplane” type propeller which is much more efficient for continuous propulsion.

      One Weta owner reports: “The EP can move the Weta on calm waters with little to no wind in the 2.8 to 3.0 knot range if you have the main and jib up. Bare pole only the speed drops a couple tenths. The apparent wind created by the propulsion of the EP helps generate the additional speed. Throttling back to the mid-range setting drops the speed by .3 kts so not much of penalty, considering the gain in range. I have yet to run the NIMH battery down to empty and would guess that the furthest I have run on a charge if 4 to 5 miles.”

      The manufacturer claims the range is as follows

      • Almost 2 hours at High speed
        (about 2.5-3.5 mph on many small boats)
      • Up to 4 hours at Medium speed
      • Up to 5 hours at Low speed

      Weight:

      The motor and battery together weigh less than 16 lbs.
      • Motor weighs 7.6 lbs.
      • NiMH Battery pack weighs 8.1 lb.
      • Smart Charger weighs 1.28 lbs.

      Size:

      • Motor envelope sizes
        Short shaft: 7” dia. x 38.5” long
        Long shaft: 7” dia. x 43.5” long
        Mini shaft: 7” dia. X 33.5” long
      • Waterproof battery comes in a floating bag 9” x 7” x 6”.
      • Smart Charger fits into a 6” x 8” ditty bag.

      Minimum battery range:

      • At High Setting, the battery will last almost 2 hours.
      • At Medium Setting, the battery will last about 4 hours.
      • At Low Setting (midway between off and Medium setting) the battery will last 5 hours.
      • Recharge time: about 3 hours.

      Speed control:

      Continuously variable but is marked as follows for reference.
      • High Setting = 100% output
      • Medium Setting = 50% output
      • Midway below Medium and Off (not marked) = 33% output

      2. Electric outboard motor

      Torquedo Travel 503/1003

      503 $1699/ 1003 $1999

      Revised for 2015 the Torqueedo Travel is sold as a replacement for 1.5 HP (503) and 3HP (1003) Engines but this is a misleading comparison, as a 3hp petrol motor will get many small, lightly loaded craft of the right hull form “on the plane”, and a Torqeedo 1003 won’t. The propeller supplied is not even designed for that sort of speed (it’s rated 9kmph at 790W, or about 6 knots flat out). Where the Torqeedo excels is pushing surprisingly heavy loads (when the 3hp petrol wouldn’t get you on the plane anyway) at up-to-displacement speeds. 4 or 5 knots in a typical 9ft inflatable dinghy, for example.

      The acceleration up to those speeds is also impressive, as electric motors (unlike petrol ones) generate full torque from very low revs – there is never a “lag” after twisting the throttle. So the Torqeedo 1003 has lots of low to mid-range push, but not the whizzy top end of a petrol. Unlike “trolling motors” it will be genuinely useful as a main propulsion unit – just not for anything much over 6 knots (12kmph).

      T500_1000_11122009

      • On-board computer with GPS-based calculation of remaining range
      • Removable battery and tiller
      • Solar rechargeable – including during the voyage
      • Stepless forward/reverse drive
      • Completely waterproof (IP 67)
      • Integrated battery with 320 Wh Li-Ion
      • Max speed 9-10 km/h (depending on type of boat, wind and waves)
      • Charging time: 7 hrs
      • Remote throttle available

      Speed in knots (km/h) Range in sm (km) Running time in hours
      Slow 2.0 (3.7) 12.8 (23.7) 06:20
      Half throttle 3.0 (5.5) 6.4 (11.9) 02:08
      Full throttle 4.0 (7.4) 2.8 (5.2) 00:42

      ePropulsion Spirit 1.0
      From US$1,799 (HQ in Hong Kong, dealers worldwide)
      Spirit 1.0 is designed to be an integrated electric outboard with high overall efficiency and long cruising duration. The power of Spirit 1.0 is equivalent to a 3hp petrol outboard. With detachable battery and a foldable tiller, it’s easy to carry and store. Its available with short (S) and long shaft (L).

      Video review here

      Input Power 1 KW
      Rated Voltage 40.7 V
      Rated Current 24.6 A
      Static thrust 66 lbs
      Max Propeller Speed 1200 rpm
      Maximum Overall Efficiency 50%
      Standard Propeller Diameter 280mm (11 inch)
      Dimensions (LxWxH) 884mm×275mm×1042mm (S) / 1167mm (L)
      34.8”×10.8”×41” (S) / 45.9” (L)
      Weight 10.9Kg / 24lbs (S)
      11.2Kg / 24.7lbs (L)
      Shaft Length 16 kg(S) 625mm / 24.6” (S)
      750mm / 29.5” (L)
      Weight of battery 7.5kg
      Battery 1000 Wh Li-po battery
      Water Proof IP67
      Range Speed(km/h) Run time(hrs) Range(km)
      Slow Speed 3.5 17 59.5
      Half Throttle 5.2 5:11 27
      Full Throttle 9 1 9

      3. Petrol (4-stroke) motor

      Super Chibi

      $500 approx

      The Thai-made Super Chibi uses a reliable 1HP Honda Engine (designed for garden tools) mated to a short drive-shaft and neat petrol tank solution.


      Engine Honda GX 25
      Maximum Power 1.0 HP. @ 7,000 RPM.
      Dimensions L660mm x W210mm
      Cooling System Air
      Driving system Direct Shaft system ,no Clutch
      Gear ratio 1:2
      Displacement Tonnage ~ 200 Kg.
      Propellor 3 Blade made from Nylon -66 Resin
      Fuel tank Capacity 600 cc.
      Weight 5.5 Kg. (Not including installation set)
      Consumption Rate ~ 400 CC./Hr.
      Performance Maximum speed 10 Kmh /5.3 knots
      (depending on load, wind, waves)
      Operation ~ 90 Min

      4. Propane Outboard

      Lehr 2.5

      Price $1000 appprox
      The US-made Lehr runs on propane and the cannisters can add to the overall weight.

      Engine Type Propane-Powered 4 Stroke OHV
      Horsepower Rating 2.5 hp (1.8 kW)
      Displacement 4.39 cu in / 72 cc
      Bore X Stroke 2.12″ x 1.37″ / 54mm x 31.5mm
      Cylinders 1
      Full Throttle RPM Range 4500-5500 RPM
      Ignition System CDI Ignition
      Starting System Manual
      Fuel Propane (110 Octane)
      Carburetion No Choke / No Priming
      Lubrication Wet Sump
      Control System Tiller Handle
      Trim Positions 5
      Gear Shift F-N
      Gear Ratio 2.08
      Shaft Length 15″
      Standard Prop 7.25″ x 6″ 3 Blade Aluminium
      Weight 37.4 lbs / 16.96 kg
      Fuel Tank Type
      On Board Twist ‘n Go 16.4 oz Propane Canister
      Remote (Optional) 11 & 17 lb Composite Tanks
      Recommended Oil 4 Stroke 10W-30
      Engine Oil Capacity 0.37 US qt (0.35L)
      Warranty 3 Year Limited Warranty
      C.A.R.B. Rating 3 Star Ultra Low
      Range 16.4 oz Camping Bottle – @3000RPM – 2.5 hrs, @5000RPM – 1 hr

      5. Weed-wacker conversion

      Some people realised you could get a crude but effective “outboard” by putting a propeller on the end of a string trimmer (aka “weed-whip”, “whipper-snipper”, “weed-whacker”, “weed eater”, “strimmer”).

      This is fine for fresh water but the weed-wackers are generally not going to use 316 marine grade stainless steel. Check before you purchase.

      There’s now a few conversion kits available that come as a complete unit or you can DIY with a donor unit

      Water Wacker

      Small Outboard Motor – 1.2 HP
      Cost:   $250 with a 2-Cycle Motor and  $325 with a 4-Cycle Motor
      Conversion Kit – for those who want to do-it-yourself:  $100.

      The Kit does not include the weedeater, which can be purchased from your local hardware store.  Fabricated from a Straight Shaft – attachment capable (Split Shaft) Weed Eater. Both 2 cycle and 4 cycle units are available.

      Performance: Weight 13.2 lbs
      Speed: Tested with a two person Kayak, West Marine’s Water Tender 9.4, Walker Bay, and a Sevylor Fish Hunter. They all ran between 4.0 to 5.5 Knots loaded with one 165 lbs person, swinger ice chest with 6 pack, fishing pole, tackle box, and oars

      Whipella

      Developed in Australia, the kit consists of a cast aluminium propeller housing which attaches to the end of the sting trimmer. A transom mounting bracket is also available. The makers claim the adapters included allow it to switch from grass cutting to outboard in minutes.
      Total packaged weight of prop unit is less than 1 kilogram.
      Cost of prop unit AU$149. Bracket AU$59.00
      Output depends on the motor used.

      6. Hand Cranked Outboard.
      Originally developed in the 60s, they are now being produced in China and offer a low-tech, quiet propulsion solution – although perhaps oars or a paddle might give you a more efficient method of propulsion for long periods. It might also make be suitable for conversion to power from an electric drill.
      Available in UK (£125.00) Germany (EUR 149), Australia (AU$169) under the Freewheeling brand and the USA ($112) as Bris.
      The bracket does look a bit flimsy and there’s no hinge to allow it to kick up if you hit anything.

       

      Conclusion
      From the options above, you can see that the petrol outboard has the best power to weight ratio and highest top speed – although there are all the issues of pollution, noise and transporting a flammable liquid.

      The electric motors may not have the top speed of a petrol or propane motor so they won’t get you planing – but they produce thrust at very low speeds and can output a steady power for reasonably long periods. The electric motors can be disassembled allowing you to stow components below deck but the shaft lengths may make it difficult to get the entire unit below.

      • This topic was modified 2 years, 10 months ago by Paul White Paul White.
      • This topic was modified 2 years, 10 months ago by Paul White Paul White.
      • This topic was modified 2 years, 10 months ago by Paul White Paul White.
      • This topic was modified 2 years, 10 months ago by Paul White Paul White.
      • This topic was modified 2 years, 10 months ago by Paul White Paul White.
      • This topic was modified 2 years, 10 months ago by Paul White Paul White.
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      • This topic was modified 1 year, 11 months ago by Paul White Paul White.
      • This topic was modified 1 year, 11 months ago by Paul White Paul White.
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      • This topic was modified 2 months, 1 week ago by Paul White Paul White. Reason: Added worldwide distributors for ePropulsion spirit & improved description
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    • #1131
      weta424
      weta424
      Member

        Hello there!

        I recently became a Weta family member (bought Weta 424) and read this topic with high interest! In Belgium we have strong currents at sea. I have allready build a motor mount for my Weta to be able to go out and return safely. Unfortunately I’m not sure how much hp I should choose to be able to return to the harbor quite fast ,even with strong currents, but also avoiding crossing the legal max. 20km/h limit. Anyone has an idea of the speed output of a 2,5hp and 3,5hp on a Weta? These are very interesting because of their low weight (17kg). All tips are welcome!

        Greetings,

        Laurent

        • #1132
          Paul White
          Paul White
          Keymaster

            Hi Laurent

            I don’t know which harbour you use, but according to this research data, the current at Zebrugge is around 4 Knots.

            20 Kmh is equivalent to 10.7 knots but there are so many variables you can’t say exactly what speed you’d get. Not forgetting that you can use the sails to supplement the output of the outboard. If there is more than (say) 8 knots of breeze you’d probably go as fast with the sails and no outboard and of course a small boat like the Weta can hug the shore to get out of the current.

            According to this test, the Torqueedo would give you a speed of around 6 knots as shown here.

            A 2.5hp petrol engine would be faster and could allow the boat to plane – the little Super Chibe 1HP motor would give you around 3-4 knots – depending on wind/waves. A 2.5 engine should be good for about 5-6 knots. There’s a test on a small boat here which gives speeds for different outboards.

            Use a GPS or a GPS App on a smartphone like iRegatta to check your speed.

            • This reply was modified 2 years, 10 months ago by Paul White Paul White.
            • This reply was modified 2 years, 10 months ago by Paul White Paul White.
            • This reply was modified 2 years, 10 months ago by Paul White Paul White.
          • #1138
            weta424
            weta424
            Member

              Thanks Paul! I will go with a mercury 3,5hp! A good speed/weight ratio and a perfect add-on back-up in case of an emergency (especially with kids onboard) or in narrow area’s (harbor, rivers,…). The Weta fun just keeps on growing for me 🙂

          • #1145
            Paul White
            Paul White
            Keymaster

              There are some French outboard solutions using Electric and Petrol motors on the French Weta forums  here

            • #1246

              Sailor Glenn
              Member

                Paul,

                In Option 2 for the outboard bracket, what is the metal used, what thickness is it, and what material is used for the block?

                Thanks,

                Glenn

                • #1247
                  Paul White
                  Paul White
                  Keymaster

                    Hi Glenn

                    I’m not sure since that was a photo from the Yahoo Weta Forums – but I suspect it would be stainless steel as aluminium would need to be pretty thick to be able to take the weight of an engine and probably would have to be welded to accept the bends in the plate shown in the photo.

                    You might be interested in this universal bracket solution http://www.v-lock.com which looks as if it doesn’t require a backing plate as the load is spread over the surface it’s attached to.

                    You’d then be able to mount an angled motor bracket to it or a lifting version here.

                    You could also use stainless toggle bolts to anchor you fitting to the stern without having make a hole in the cockpit to add a backing plate.

                    The mounting boards tend to be either hardwood or polyurethane.

                    This bracket on eBay may be a good cheap alternative.

                    Hope this helps

                    Paul

                     

                     

                    • This reply was modified 2 years, 9 months ago by Paul White Paul White.
                • #1495
                  Paul White
                  Paul White
                  Keymaster

                    The Aquaparx – Another miniature 1.2hp 4-stroke outboard – this time from the Netherlands.

                    €199.00

                    Dimensions 25 X 26  X 106 MM
                    Weight 8.1 KG

                    More info here

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