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Published 21.08.2015 | Author : admin | Category : Plywood Jon Boat Plans

To handle the thrust, i am thinking of using a block bearing mounted on the cone of the transmission like this much more heavy duty of course.
Location: AZ, USA I too have been doing research and gathering information in preparation for the rebuilding of an older boat and to change it to a surface drive setup. Mike, I live in Phoenix also and your idea of using a 2-speed transmission along with a surface drive is the same idea that I have.
I will be using this boat for many different functions such as: cruising the lakes, family boating, water skiing, and fishing. I first considered changing the outdrive to a Bravo I or Bravo III, but they are probably easier to break than the TRS unit.
So I have narrowed my drive choices to using either a V-drive setup or a Surface drive setup, but I am actually considering a combination of the two setups. I also decided to use a 2-speed transmission because I wanted to be able to pull water skiers and then later go racing against my buddies boat without needing to change the prop for the two different situations.
I have to replace the rotted wood stringers and will replace the wood in the transom (I don't want there to be any wood left in the boat to rot in the future) at the time I fill-in the outdrive mounting hole.
The engine would be placed just behind the driver's cockpit with the transmission under the full width driver's bench seat with the Casale drive placed under the floor at about where the walk-thru windshield passage is positioned.
I was most concerned about a sharp propeller protruding far out the rear of the boat that could potentially injure people swimming up to the boat at the transom when a water skier would be picked-up out of the water or when the grandkids are diving off the rear of the boat into the water. I am even thinking about building the transom extension to have a semi-circular water flow channel to direct and contain the water flowing from the bottom of the boat into the propeller in a laminar flow path like the shape of the water passage in a jet pump inlet that channels the water into the impeller. The boat will also have trim tabs that will allow me to better trim the boat's bow up so that I can get as much air under the boat as possible to reduce wetted surface water friction at high speed. You can build your own 2-speed surface drive setup by simply converting a V-drive setup to exit the transom with the rudder extension. Location: australia I have owned and been in a few other boats with car automatic boxs and they work ok. Location: AZ, USA Gonzo - regarding the use of the automatic transmission - most times when an automobile automatic transmission is used in a boat, the torque converter is not used. Most automobile transmissions that are adapted for use in boats have the shifting valve body replaced with one that changes it from automatic shifting to manual shifting so that it functions just like the newer ZF 2-speed gears. An automobile transmission can not be used for thrust loading because it does not have any thrust bearings built-in to it. The only less than optimal design issue that I know about when using an automobile transmission is that the gear ratio is not very optimized for boating.
If anyone knows of a low cost set of water cooled exhaust manifolds that will fit the GM LS series engine, please let me know, as I will probably need a set for my Stoker project. I have selected the BBC for the Hallett rebuild because it is a very durable engine that can produce large amounts of power naturally aspirated.
My next question is "How do I determine the Hallett's center of gravity so that I can determine its balance point"? Location: Vancouver Thanks for the write up Brent,seems like you know your engines.
Originally Posted by gonzo I you have a lift bar, the boat will hang horizontally when the attachment point is above the center of gravity; just like an equal arm beam scale.
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When making potentially dangerous or financial decisions, always employ and consult appropriate professionals.
The current trend in fishing kayak design is to produce kayaks that are increasingly wide and heavy, and no longer qualify as car-top boats but rather as microskiffs or small boats that require a trailer.
It turns out that most large-size fishing kayaks can be outfitted with electric trolling motors that are mounted either on the side or in the middle of the kayak – right in front of the user.
The only fishing kayak that can be flawlessly motorized is the Wavewalk, as we’ve already mentioned here. Wavewalk has recently introduced a set of accessories that enhance the performance of its patented catamaran kayaks in terms of motorizing, and turn them into high performance car-top motorboats, or in other words – personal microskiffs. With its new, black, inflatable side flotation modules, the new W570 INF 20-15 looks like a rigid-inflatable boat (RIB), which is a type of boat commonly associated with high speed and rescue operations.
The new transparent spray shield makes this little boat look like a marine motorbike, or a twin-hull personal watercraft. In sum, we see a noticeable upgrade in what Wavewalk offers in the market for portable fishing motorboats. The kayak was stable and its driver stayed dry, and Kenny reported neither tracking nor steering problems. This successful test further reinforces the notion that when motorized, the patented catamaran kayak from Wavewalk can serve as a personal motorboat, or car top microskiff. The driver controls the motor and steers the craft through the tiller handle, which is outfitted with an articulated (jointed) tiller extension allowing for effective steering even when the driver is standing up. This little wonder fits on top of any car rack, and inside some medium and large size vehicles.
It’s easy to carry just by dragging in on the ground by a strap attached to its bow, as demonstrated towards the end of the video clip.
This watercraft can be outfitted with detachable flotation modules that would keep it afloat in case of a capsize accident leading to much water getting inside. The more traditional ways to look at this small boat are either as a motorized fishing kayak or a personal microskiff.

Learn more about the W500 - the world's stablest fishing kayak that enables true stand up kayak fishing to regular people who fish in real-world conditions.
These kayaks have much more storage space than any other kayak, and they are absolutely back pain free. Kayak Stability and Fishing StandingA kayak's stability is key, especially if you want to fish standing in it in full confidence.
Many kayak manufacturers claim they designed their kayaks for stand up fishing, but other than pictures in glossy magazines and videos showing young and athletic fishermen who stand on their kayaks and fish in mirror flat water, how practical are these products for average anglers in everyday fishing trips? Can a middle aged or elderly fisherman feel at ease getting up and standing on a SOT kayak, and could they ever feel confident fishing from it?
There is more to standing up and fishing from a kayak than just that - You need to do it comfortably and safely, have a plan B in case you lose balance, and be able to focus on what you're doing i.e.
Russ needs both types of motors (electric and gas) since some lakes & ponds are for electric motors only. Russ installed a fish finder, compass, a radio, and racks to hold the paddle and push pole.
Russ also installed a small seat from a rowing machine on top of the W saddle, as well as two electromechanical jiggers. Russ plots out the lakes before he fish them, marking the outline of the proper depth for his type of fishing with buoys on his GPS screen. It came from the factory with a 454BBC engine with a Mercury TRS outdrive and a single speed Merc-Trans transmission to provide Forward-Neutral-Reverse.
I then considered a V-drive setup because it can handle much more power than any outdrive that is within my budget.
The engine would be placed as far to the rear as possible with a 2-speed transmission attached facing forward, then coupled to a Casale V-drive box to send the driveshaft to the rear and also allow the drive shaft's down angle to be set to about 2-4 degrees to travel beneath the engine and exit out the transom just above the bottom of the boat. Also the low gear will help the boat get up on plane quicker as it will help to keep the engine in its upper rpm power band range as the boat gets underway. This will be a complete ground-up rebuild as there is not much left of the original boat except the hull that is worth keeping. These trim tabs will act like large cavitation plates used on the V-drive and jet pump configuration of this same boat.
Usually fitted with a tapered roller thrust bearing mounted on an angle steel beam behind the box. In my layout the thrust will be taken by the surface drive unit at the transom or by the Casale gear box depending on which design surface drive unit I ultimately use. I have 2 all aluminum LS3 engines and I also have several turbochargers sitting in my garage. I wanted the Hallett to be as bullet-proof as possible because my kids & friends will be borrowing it and I want it to be easy to use with no bad habits and be hard to break. The boat is on a trailer and I have the ability to lift it off either using one of two front-end loader tractors I own or with an overhead crane that can be rolled in place over the boat. Simply, overpowering any boat, including a kayak, is hazardous, weather because the extra torque and speed make the boat harder to control to a point where the driver could lose control and capsize it, or because a powerful motor can overstress the part of the hull to which it’s attached (typically the stern), and make it develop cracks that could cause the boat to sink. Note that the TMM 20-15 mount featuring in the above video was reinforced with a double mounting plate. This defies the purpose of kayak fishing, but some anglers opt to purchase and use these boats. In this case, a patented fishing kayak offering unrivaled stability and comfort as well as unmatched storage space and dryness can turn into a self-motorized water skiing device by virtue of its small size, light weight, ease of use, and tracking capabilities.
The 2 hp Honda outboard motor weighs 29 lbs, and the transom motor mount adds five more pounds to the total. It is, and a simple and effective cockpit cover would provide additional protection from spray. The difference between the two viewpoints is related to whether you’re used to fish out of a kayak or from a motorboat. He also put another bolt in each side of the motor mount, to make it more stable and rigid. Note the eyelets on the hull sides are part of the 502 configuration, and that’s where you attach the XL flotation modules. With this much power, the original TRS outdrive and transmission would probably not survive very well.
The outdrives that can handle the power level that I desire are much too costly for me to consider. The Casale will allow me to inexpensively change the gear ratio to fine tune the boat's performance at much lower cost than is possible by changing the transmission's ratio or the propeller.
And it could even be kept in the low gear for general boating where the speed is not likely to exceed 40 knots, like when pulling the kids on water toys.
I am wondering if I should also build in a pad at the rear keel of the boat to aid the boat being lifted out of the water at high speed. If you use a thrust bearing mounted to the transom, it will give your boat a similar thrust center of gravity position to other types of drive options. 2 spd powerglides use to be sold as a marine box with the torque converter and rear extension removed .
The 2-speed GM PowerGlide transmission has this issue as does the 3-speed GM TH400 that are commonly used for boating. I presume that I need a calibrated strain guage, or other means of determining the weight on the lifting chain, and then by lifting the boat at various points from bow to stern and running some calculations, I can determine its center of gravity in its current condition.

Remember that the more powerful the motor the heavier it is, and that in case of an accident, the amount of flotation you use should suffice to keep the boat afloat with the motor attached to it. Some are outfitted with an electric motor mounted in the back, at a big distance from the driver, which isn’t very practical when you go in shallow water where weed and grass are commonly found, and these tend to get entangled in the propeller.
However, I tried very hard to capsize it today and it never looked like getting close to it. The only difference for the hull between these setups was the use of a metal cavitation plate mounted across the back of the transom for the jet and V-drive setups.
I was able to purchase a new old-stock Arneson 1720 surface drive for a good price and I am considering using it.
That way I can purchase less expensive surface drive props that come available from time to time instead of buying a custom expensive prop designed specifically for my boat's operating configuration.
I have an old-school B&M Art Carr transmission that was made from a Chrysler torqueflite 727 with 1st gear removed and a very short tail housing. I will change the seating configuration by creating a driver's cockpit as far to the rear as possible just in front of the engine compartment and have a walk-thru windshield and then have a wrap-around couch front seating arrangement that will allow as many as 10-12 people to sit in the large front bow seating arrangement, like the photo attached, except that the center console in the photo would be replaced with a walk-thru windshield and positioned a little further to the rear allowing an additional 4ft more of seating to be placed on each side of the wrap-around arrangement.
You could also opt to have a simple seal at the transom and allow the thrust to be applied to the Casale box which would put the thrust center of gravity well forward of the transom.
This is exactly the way that Mercury Marine did it with their MercTrans that came stock in my boat.
The Chrysler 727 that I am planning to use has a .48 ratio between its normally 2nd gear and 3rd (final) gear.
Engines setup like this can produce 700-800hp depending upon the cam and fuel delivery system. Knowing the weights of the various drive and interior components, I can then add those weights to the calculations to determine the final balance point. I would hate if my boat came back to me after being borrowed and it had a broken drive unit. This allows the transmission to be only about 18 inches long, much shorter than the TH400 GM transmission or the even longer 700r4, and the Chrysler 727 has many after-market parts to allow it to be upgraded to handle more than my power level since they were often used in supercharged drag strip automobile applications. I can also fabricate a fiberglass foam core cover plate to attach over the top of the entire open area of the bow seating, gunwale to gunwale, to convert the boat to have a front walk-on deck like the bass fishing boats have. The more forward thrust position will make your boat more straight-line stable and the rear thrust position will make the boat turn more easily.
Knowing this, it is important to setup the camshaft in the engine to have a much wider torque curve so that you don't loose too much torque when shifting.
It saves between 250-350 pounds of weight over the BBC and properly setup can produce 700-800HP. It is the torque that I am after and I will probably have a rev-limiter on the engine to prevent it from turning more than about 5500rpm even though it could probably easily go to 6500rpm. So where do I lift from and how do I gather the weight measurements and what calculations are used? I think running a transmission out the rear of the boat to a yolk slip with a surface piercing propeller would do the trick! I do believe that the BorgWarner transmission (gear as it is called in boat language) used in most smaller boats is also shifted using the same principles as the automatic transmission used in automobiles. Depending upon the propeller used and how much of the prop is in or out of the water to accommodate slip allowing the engine to stay in its power range, just after shifting to the higher 2nd gear, can all help minimize the engine loading that can bog the engine upon the up-shift. That is exactly why I have selected the LS3 to be used in my other boat project that is a 20ft Stoker SST.
I have a really nice 52mm throttle body setup that can be used that sort of looks like a set of 4 twin throat weber carbs. I figure that I need this information so that I can better determine the size and placement of the trim tabs. If the transmission needs automatic transmission fluid, then it shifts in the same way a car automatic transmission does, just not with all of the internal gearing. I know that the Hallett will need some help lifting the bow while running as the manufacturer would normally use cavitation plates to do this when this hull was setup for a jet drive or as a V-drive configuration. The Stoker has a modified tunnel vee hull and was designed as a mod-VP race boat, so a Blackhawk surface drive will work well with it as the hull wants to ride on a cushion of air packed under the hull trapped in the tunnels. Fuel injection, if installed correctly, can make for very easy starts and operation on the water, especially for those that borrow my boat.
Naturally aspirated the LS3 can easily produce 450hp, which is about the limit of the gears used in the BlackHawk if I want to keep it reliable. The previous owner of my Hallett told me that the 454BBC with the TRS outdrive gave him a top speed of 65-70mph depending upon boat weight and water conditions. Without turbos the LS3 could make the Stoker a 110+mph boat as they will go 90+mph with a Merc 2.5 outboard engine.
I am expecting that with the changes I am making, the Hallett will have a top speed of about 80-90mph. If I wanted to go crazy and turbocharge the LS3, the Stoker could be a 140+mph boat, but I don't want to die like the other crazy fool that put a Nascar Chevy 350 race engine in a Stoker with a blackhawk drive and pushed it to 148mph.
I was told that this man later died when he decided to go show-off and crashed his Stoker after drinking one day with his buddies.

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