M&D Zero Drag Seals
We all know that one way to increase the amount of power applied to the water is to reduce drag wherever possible. In November of 2000, M&D designs pursued a replacement for the standard 2-lip rubber crank seals that the G260PUM uses. Almost anybody you talk to will tell you that a new engine picks up several hundred RPM after a gallon or two of gas has gone through it. While it’s true that this is due to the engine “breaking-in”, a good bit of the “breaking-in” process is the rubber seal lips loosening their death-grip on the crankshaft!!
For this reason, M&D set out to design a seal suitable for RC boat racing, and peak performance, but without the mess and air-leaks that some fixed, close-tolerance seals aim to achieve. The M&D designs Zero Drag crank seals are the answer! These seals use a fully CNC-machined billet aluminum outer shell, and a CNC machined bronze element, suspended by a rubber o-ring.
Extensive testing has shown typical gains are approximately 0.2 HP, and 200-300 usable RPMs. The best thing about these seals is you reduce drag at ALL RPM ranges! There are very few modifications possible to a 2-cycle engine that give you an increase in torque and power output across the entire RPM range. This results not only in more top speed, but also better acceleration, and improved ability to get “on the pipe”.
M&D designed the push in style Zero Drag seal that is quite commonly sold today. These were for our "Mid Mod" series of engines. A cheaper way to get some of the benefit of the original two piece. If installed correctly, these push in style work quite well. I find very few of the knock offs are installed well and usually are placing pressure on the crank shaft because of poor alignment.
For this reason, M&D set out to design a seal suitable for RC boat racing, and peak performance, but without the mess and air-leaks that some fixed, close-tolerance seals aim to achieve. The M&D designs Zero Drag crank seals are the answer! These seals use a fully CNC-machined billet aluminum outer shell, and a CNC machined bronze element, suspended by a rubber o-ring.
Extensive testing has shown typical gains are approximately 0.2 HP, and 200-300 usable RPMs. The best thing about these seals is you reduce drag at ALL RPM ranges! There are very few modifications possible to a 2-cycle engine that give you an increase in torque and power output across the entire RPM range. This results not only in more top speed, but also better acceleration, and improved ability to get “on the pipe”.
M&D designed the push in style Zero Drag seal that is quite commonly sold today. These were for our "Mid Mod" series of engines. A cheaper way to get some of the benefit of the original two piece. If installed correctly, these push in style work quite well. I find very few of the knock offs are installed well and usually are placing pressure on the crank shaft because of poor alignment.