Arrow Shark 2013 Outboard Dragon Drive Owner Manual Introduction Our purpose in designing the Dragon Drive is to offer a high quality, sleek looking and durable outboard drive for the growing RC F1 (Formula One) gas tunnel market. Designed for realistic operation on boats such as F1 Tunnel Hulls, the Dragon Drive can be fitted with our XP254M series engine for outstanding performance, or alternatively just about any other 23cc 31cc Zenoah mount compatible type engine can be easily installed without modification. The greater the time you dedicate to details whilst creating and developing a new product, the more issues will be found that can be improved. The more such issues you can attend to before the product is released, the more successful will be the product, and the happier will be your customers using it. Arrow Shark acknowledges that any of our new products may not be totally flawless for its release, because all products can be improved from time to time, especially in the light of customer feedback from use of the product in the "real world". However, Arrow Shark can and does put timeless testing and evaluation into our new products before release, and we do the best we possibly can to make each new product as near to perfect as practical before release. We have followed this approach with our new outboard Dragon Drive. After completion of extensive testing on the Dragon Drive, which has been in progress for almost two years with consequent re designs and improvement, the performance of this great drive has finally reached our expectation and we are very proud to present it for you
Dragon Drive Dimensions
Dragon Drive Weight Dragon Drive Parts List ODD#0001 Billet Main Body ODD#0009 Square Insert Collet ODD#0002 Top Cover & O Ring Seal ODD#0010 Middle Gear Barrel ODD#0003 Steering Bracket Assembly ODD#0011 Hardened Drive Shaft ODD#0004 Billet Lower Unit ODD#0012 Throttle Adaptor ODD#0005 Riding Plate ODD#0013 M4x10mm Bolts ODD#0006 Prop Shaft Housing Assembly ODD#0014 M5x25mm Bolts
ODD#0007 Clutch Bell Assembly ODD#0015 M5x40 Bolts ODD#0008 Clutch Shoe Assembly Procedure Items Required: 5mm Socket Hex Wrench (short wrench head) 4mm Socket Hex Wrench (short Wrench head) 3mm Socket Hex Wrench 2mm Socket Hex Wrench 21mm Wrench Loctite Silicone Sealant Machine Oil Note: Loctite should be applied to all bolts in the following assembly.
Apply some sealant on the flat part of the steel prop shaft housing, and apply some Loctite on the thread part of the housing. Note: The above sealing procedure is very important; without properly sealing, water might get into the lower unit or oil might leak out. As well, the Loctite on the thread part of the steel housing is very import, especially for the Dragon Drive with counter rotation application; without Loctite on the thread, the housing might loosen during operation which could cause gears to become improperly engaged leading to wear and possible damage. However, when you plan to unscrew the housing for maintenance or changing the oil after having applied Loctite on the thread, you will first need to loosen the Loctite by heating the thread area from outside of the unit with a heat gun. This technique will avoid damaging the threads on the inside of the lower unit. Using the 21mm wrench, screw the prop shaft housing assembly into the lower unit; please keep the front side pointed down until the sealant is dry. Apply some sealant to the middle gear housing. Fill the lower unit with gear oil ensuring that the bottom prop shaft gear is completely immersed in oil. Insert the middle gear housing into the lower unit, and then put it to one side for the moment. The sealing O ring has been factory installed in the main body unit; check that it is seated correctly and make ready for the next step along with the riding plate.
Position the riding plate on the bottom of the main body and use M4x10mm bolts to tighten them together; make sure to apply Loctite on the bolts. Get the steering bracket assembly and steering pivot pin ready for the next step. Connect the steering pivot pin via the steering pin holes on the top unit and the bracket assembly as shown on the above left picture. Use an M4 hex nut to tighten via the thread on the lower section of the main body to hold the pivot pin in place as shown in the above right picture. Now get both upper and lower assembly units ready for the next step. Apply some sealant around the top edge of the lower unit as shown in the above right picture.
Connect these two parts together and make sure the water intake nipple on the lower unit is properly aligned into the matching hole on the riding plate. Using two M5x25mm bolts, tighten these two parts together as shown in the above right picture. Prepare the clutch system and drive shaft for the next step. There is a circle mark on the outside of the square end drive shaft; make sure this end is going to the engine side (to the clutch bell and collet insert hole). Insert the other end of the drive shaft into the 1/4 square insert on the top gear shaft as shown in the above left picture. Install the clutch bell into the top unit and match the drive shaft square end into the square insert on the clutch bell.
There are two M5 thread holes on both sides of the top main body as shown in the above left picture; using two M5 hex nuts, tighten via the holes till they gently touch the clutch bearing in order to hold the clutch bell in place. Note: when you try to take out the clutch bell and install the collet instead, you will need to first unscrew these two M5 hex nuts before you will be able to release the clutch bell from the top main unit. Attach the throttle cable adaptor into the top cover plate and tighten it with an M5 bolt. You can adjust its position by loosening the bolt. Set Up & Performance Tips Set Up Dragon Drive with Clutch Installing the Clutch into your Dragon Drive will make it easier to launch and operate your boat. You will also be able to idle and stop your boat in the water with the engine still running, but if you do this for more than a minute, you must provide a separate water pump in the boat to cool the engine.
*Take out the spark plug from your engine and screw a piston stopper into the spark plug hole. *Position the Billet Water Seal Front Plate on the drive shaft end of your engine and install the clutch shoe on the engine crankshaft. Use the bolt from the square shaft collet (that comes in the package), and tighten it into the crankshaft. *Install the square ended both ends drive shaft into the drive along with the clutch bell, then, tighten those two M5 hex nuts on both sides of the drive to hold the clutch bell in place. *Insert the clutch shoe and engine assembly into the clutch bell at the top of the Dragon Drive unit. Secure your engine and clutch shoe into the clutch bell and Dragon Drive with the M5x40mm bolts. Your engine, clutch and Dragon Drive installation is now complete.
Set up Dragon Drive Without Clutch CAUTION! If the clutch has been removed, EXTRA CARE must be taken as the prop will be spinning whenever the engine is running, even when only at idle revs. Be especially carefully when starting your boat without a clutch, and when moving it with the engine running such as taking it to the water for launching. Do not allow other people near the back of the boat at any time, and ensure you do not allow any part of yourself or your clothing to be near the prop. * Remove the spark plug and insert a piston stopper into the spark plug hole. Use a heat gun on the clutch shoe bolt for about 20 seconds, then use a 6mm hex drive to unscrew the bolt until it is extended about 10mm out of the crankshaft.
*Hold the clutch shoe with one hand and then gently use a hammer to tap the top of the bolt until the clutch shoe comes off the crankshaft. *Loosen the M5 hex nuts from both sides of the Dragon Drive; then use a rubber hammer to gently tap on the bottom of the clutch bell housing until the clutch bell and bearing assembly come off the drive. Install the square insert shaft collet onto the crankshaft.
*Install the square ended both ends drive shaft into the drive. * Align and insert the square head of the drive shaft at the top of the Dragon Drive into the square insert of the collet on your engine. Secure your engine and Dragon Drive with the M5x40mm bolts. Your engine, square insert collet and Dragon Drive installation is now complete. Dragon Drive & Hull Set Up When installing the Outboard Dragon Drive onto your F1 tunnel hull, it is recommended that the prop shaft centerline be approximately 15 to 20mm above the level of the bottom of the sponsons.
Throttle Linkage Setting The Dragon Drive is designed to work on Arrow Shark rotated carburetor blocks with either WT series or WYK series Walbro carburetors. However, it will also be easy to work on Zenoah standard carburetor blocks with any of the Walbro carburetors typically fitted to these engines. To connect the throttle arm of your engine s carby to your radio s servo, a flexible cable such as is used for bicycle brakes can be adapted and fitted. Various other RC hobby cables can be used too. The size of the flex cable would be around 1.5mm in diameter and the cover tube about 4.3mm diameter; also required is a cable adaptor of the type shown in the picture above. Remove the carburetor throttle adaptor from the WYK 33; fit the cable adaptor onto it, then re install the throttle adaptor back onto carburetor.
*The inner diameter of the CNC cable adaptor would be around 4.4mm, so a diameter of 4.3mm on the bicycle or other flexible cable cover tube would be a neat fit when inserted about 15mm, and it should stay firmly inside without needing to apply any glue. *Install the CNC cable adaptor back onto the drive cover plate and screw the bolt nut on the top but do not yet tighten it. *Run the inner flex cable through the outer tube and also through the cable adaptor on the carburetor; then tighten the 3mm hex nut on the adaptor to hold the cable in place. *Adjust the CNC cable adaptor position and make sure that the flex cable is straight when the carburetor barrel is in the fully open position. When the cable position is set, tighten the nut with an 8mm wrench; the installation is complete!
If you are using the Arrow Shark rotated isolation carburetor block with a WT series carburetor for your engine, you can connect them at same way we did on WYK 33 carb as shown in the above right picture. * If you are using a standard Zenoah carburetor isolation block on your engine, you can link the cable directly to the carby butterfly arm as shown in the above right picture. Water Cooling Connection
Functions You can adjust the height and prop angle of your Dragon Drive as follows. Apply Loctite to all bolts and re tighten after adjustment to keep them secure during operation. #1: These are the vertical height adjusting bolts. Loosen these 4 bolts to adjust the complete unit up or down. #2: This is the prop angle securing bolt. When you have set the prop angle at your preferred position, screw in this bolt against the base of the bracket to maintain the correct prop angle during operation even though the #3 adjusting bolts are loosened. #3: This is the prop angle adjusting bolt A. Loosen this bolt to slide the Drive in or out and so adjust the prop angle for optimum performance. #4: This is the prop angle adjusting bolt B. Loosen this bolt when adjusting the prop angle, and tighten it when finished. #5: Adjustable throttle cable adaptor makes it easy to link the flexible cable from your servo to the engine carburetor. #6: Water outlet nipples link to your engine water jacket with tubing for proper engine cooling.
Lower Unit Bearing Setting The bearing in the Dragon Drive lower unit (shown in the picture above) is designed to be a loose fit, so that it can be easy to take out when you need to replace it. It is held in place by some Loctite; therefore, every time when you change the gear oil and re install the prop shaft housing assembly, make sure this bearing is still correctly in place. Make sure there is enough gear oil in the lower every time you use the drive. Thank You! Enjoy your Outboard Dragon Drive! www.arrowshark.com