Latest Builds

Finally got my Lazer 45 done. It's got a modified Zenoah G260 (see mods project below) with a Hanson 100* header and tuned pipe. I'm using a M&D outdrive and the rest of the hardware is by Speedmaster. The muffler was scratched built by me and using a variety of modified props,a MW-3 and a G-25 from Captain Chuck chorton3@cox.net. I also have some other older props to try too. I have a Sendec tach and an Etrex GPS installed. Mounts are by Speed World. This is going to be a play boat, that's if we ever get our lake filled back up.Click here for some start to finish pictures.


 

This is my Stryker cat "Scorpion". It originally had one of four ever made, custom built J&G 29cc engine producing 16,500 rpm's under load. I sold the hull to my brother-in-law (after considerable nagging) and sold the engine separately. He is going to run a new Zenoah 260 modified by me and keep the J&G hardware with the rudder on the left. The boat is being pushed by a modified 7015 or a 3 blade 7016 prop. In the radio box are HiTech servo's and a Prather Safeguard failsafe. I've installed an IV bag for a fuel tank and air bladders for floatation. With the original 29cc J&G this thing is almost scary on the water!! It'll be interesting to see how it goes with the 260 installed. Thanks to Russ at RC Boatworks for all of his help. For a large view click on the picture at left and here for the construction pictures from start to finish. I'll get a movie up on it as soon as I can.

 

This is the Expresscraft 70" Apache "Just Bad" unlimited deepvee. It is powered by a Zenoah G42 highly modified engine. Engine modifications and custom exhaust were done by Marine Specialties I'm running a re-worked Octura 482 prop. It has a combination of homemade and Octura running gear. The Walbro WYK-33 barrel style carb with a 15mm bore, has a substantially bigger return spring than the Walbro 167 that's on a 23cc engine and requires a 1/4 scale servo. For how big this thing is it really kicks butt!! I have traded this baby to Joe Tocco in Texas for a gas powered dune buggy. I'm going to miss her!! For a large view click on the picture at left and here for the Engine Transom or click on the movie link below to see a movie of this model.

 

This 56" Dumas Scarab 38KV "Bad Attitude" was the first gas boat I built. It now is owned by a boating friend down in Pueblo, Co. It has a B. H. Hanson Indy engine with AeroMarine hardware and turning a 472 prop. The exhaust is an RPM pipe and a Hanson header and flange. Custom "House of Colors" urethane. For a large view click on the picture at left and here for the Engine Transom or click on the movie link below to see a movie of this model.


 

This is the 44" AeroMarine Stinger "2-Bad-2 Lose". It has a B. H. Hanson Indy engine with a custom mount spinning either a custom 4 blade from the "Prop Shop" or the "Octura" V967 3 blade. On the transom is a "Gardner" strut and rudder assembly which is a work of art. The exhaust is an Irwin pipe, header and flange. Decals by Jeff Rossi are of high quality and they look great. I have since sold this boat to another local boater. For a large view click on the picture at left and here for the Engine Transom or click on the movie link below to see a movie of this model.


 

This is the 43" AeroMarine Cat "Purple Haze". Only cat I ever built. One of my boating friends made me an offer I couldn't refuse. Now I get to race against something I built 8-). It has a B. H. Hanson Indy engine. On the transom is a clone of the J & G rudder assembly and a Octura flat bottom strut. The exhaust is an RPM pipe and Hanson header and flange. Custom "House of Colors" urethane. For a large view click on the picture at left and here for the Engine Transom or click on the movie link below to see a movie of this model.


 

This is the Aventura II seaplane that I just finished. It has a 43" wingspan and a length of 34" with a wing area of 333 sq.inches. The hull is fiberglass. It's powered by a Graupner 480 Speed motor running on a 7.2 volt battery pack. The prop is a Kavan 7X4. Flying weight is a tiny 28 oz. For a large view click on the picture at left and here for construction pictures from start to finish.


 

This is my scratch built "Gator Bait II" somewhat of a scale appearing airboat. It has a 23cc Zenoah engine turning a custom built four blade Zinger 12X10 pusher prop. The hardest part was the custom made prop guard made of round brass stock. I put on Century 21 paint and decal lettering and graphics. For a large view click on the picture at left and here for construction pictures from start to finish. Check out the two new movies.


 

Blizzard is a 35X18 fiberglass covered boogie board that runs better on land than on the water. I'm going to keep it and use it during the winter when the water is hard, there's snow on the ground and I'm bored. It has a 23cc Zenoah engine turning a Zinger 16X8 pusher prop. For a large view click on the picture at left and here for the construction pictures from start to finish. or click on the movie link below to see a movie of this model.


 

This is the 48"x24" airboat "Gator Bait" which I scratch built and is now owned by boater friend Kevin Paulson. I plan on building another 1/4 scale airboat, but closer to a scale appearance. Gator Bait spins a 18x10 prop turned by a Homelite 30cc modified engine with a big bore carb and homebuilt tuned exhaust. Constructed of 1/8" plywood covered top and sides with fiberglass mat and completely sprayed with 2 coats of polyester resin and 2 coats of lacquer. It sports stenciled and hand painted graphics. For a large view click on the picture at left and here for the EngineTransom or click on the movie link below to see a movie of this model.



Projects...current and future

After many years of wanting to do a large twin engine cat, I'm finally going to do it. This is the Expresscraft System cat that is 60"x18". It is very light for the size. I'm using two modded Zenoah 260's. The exhausts are the new Quickdraw wrap to center adjustable tuned pipes. Two modified (2) bladed Prop Shop props. Mixture of Speedmaster and scratch built hardware. It will get a wicked paint job on it before next summer. For a large view click on the picture at left and here for some construction pictures.


 

I've started the "Wiggy" kit and will work on it as weather allows because of my unheated garage. I'm done with the hull of the "Windy" airboat which is the basis of this truely unique craft. I'll soon start with the WIG modifications. Check the "Progress Page" for some pictures that I'll try to update as I go along. The father and son team of Paul and Joe Rice has spent a lot of R & D time getting these things to fly. If your interested in this type of craft please vist their web site. Click on the picture at left for a large view or click on the movie link below to see a movie of this model and the "Drag'N'Fly" Wig. Amazingly the "Drag'N'Fly" is the same size and weight of the "Wiggy".They both are a .25 sized craft, but are so efficient they run on .15 size engines, an engineering feat. Also check out my "Links" page for the WIG Page site that shows many full size WIG boats and their history.

 

This is me and my brother-in-laws 1/4 scale quasi monster truck. It's powered by a 4 hp Tecumshe lawnmower engine. The frame is all handmade and welded by him. He will undoubtly need wheelie bars :-) For a large view click on the picture at left and here for some construction pictures.


 


Solutions and Tips

Click on the picture to see a larger view of my mini machine shop to help support my rc boat habit. Both mini mill and mini lathe are from Harbor Freight and are perfect to make the hardware we use on our boats. Now I just got to learn how to use them :-)

 

 

Here is some info of the piston mods to a Zenoah G260 motor. Also shows some of the hardware needed to do your own modifications besides needing to have a lathe and mill machines. Click the picture to the left to go to the mod page for more info and pictures.



 

This project was to scratch build a gas engine muffler. Click the picture to the left to go to the mod page for more info and pictures.




 

A simple solution to a problem some people seem to be having with trouble of keeping a good needle on the G260. Click the picture to the left to go to the mod page for more info and pictures.




 

Rudy has finally completed his experimental self-righting boat project. This is such an extensive project/solution that I made a separate page for it so that you can see it in it's entirety. Click on "Self Righting Boat Project" to go there now.




 

This is a great solution for a tight engine compartment by Dennis Watson. (click here for his home page) He designed these 90 degree manifolds for his engines. He made it look easy. They say the best designs are the simple ones. After looking at these pictures I think you'll agree his is simple, but functional. Click the picture at left and "here" for another view. If you have any questions you can contact Dennis directly by clicking d.watson2@worldnet.att.net



 

This is a scratch built tuned pipe holder. It clamps on the header and the strap prevents the pipe from turning or moving in or out. Works great. Click the picture to the left to go to the mod page for more info and pictures.



 

If you have a great tip or solution that you would like to share with other boaters, email it to me and it will be posted here. Please include any pictures that might help show your tip or solution. Mail to manross@martysrcboats.com

 


***Stolen Boat***

Click on picture for a bigger view. I sold this boat to a gentleman (I use the term lightly) back around 1992. I just found a picture of it now, thinking I had tossed all of them long ago. The hull that was stolen was exactly like this one, except it was red in color. The guy's name is Mitch Miller. He skipped town and never paid me for the boat. The hull is an old and now defunct International Hobbies 55" deep vee. It use to have a 23cc Green Machine motor with a homemade watercooled head. If you have seen this hull or know of Mitch Miller, please leave me an email. The last I heard, he might have been in Florida. Thanks in advance for any info.




Everything Else Past/Present

This is my new mobile on-board video camera setup. The VCR, transmitter and color TV is powered off of a 12 volt car battery. The camera transmitter weighs next to nothing and is powered by a 9 volt battery. I will be using this on my airplanes, 23cc Monster Buggy and of coarse my boats. I'm going to build a water proof enclosesure for use on the boats. Stay tuned for some cool video's.

 

 

This is the Traxxas 23cc powered Monster Buggy that I traded a boat for. It is wicked fast and loves the dirt. I have both the slick tires for pavement and the off road tires for the dirt. It has a Traxxas tuned pipe which really helped the acceleration. Click on the picture at left for a big picture. Here for more pictures.

 

 

My Slow-Stick park flyer is a lot of fun. It can be flown in a very small area. Uses the micro control receiver and servo's and a 300 power system. On-board video system

 

 

This is one of my first RC gas boats that I built. It was a International Hobbies 49" deep vee with an old worn out Eager Beaver engine. It was the second gas boat here in Colorado Springs. Click on the picture for a bigger view of it.



 


The three wheeled model pictured here was powered by a K&B 7.5 airplane engine. It was so fast I'd wear out the turning wheel after a few runs. :-) Estimated speed was 70 mph. I'd walk away after a run in a full sweat!! Click on the picture for a bigger view of it.



 

I really don't remember the make of the hull, since I only had this for a couple of months. It was a fun boat, but a pain to transport around. Click on the picture for a bigger view of it.



 


I took this kit in trade. It's the 1/10th scale Kyosho Double Dare 4wd and 4ws. It has dual Lemans motors and a Traxxas XL-1 speed control. It was fun putting it together and really climbs great. I just have to make a boat trailer now!! Click on the picture for a bigger view of it.



 


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