Metal Gear Servos

Introduction

The Losi fares better in the servo durability department than many models due to the stock metal geared servos, however there are still those who may want to seek an upgrade. Usually the reason will be to replace a broken servo however, as the stock servo setup provides plenty of turning torque and durability.

Whatever the reason you have for swapping the steering servo, I certainly recommend staying with a metal gear servo as a replacement. They offer a great deal more durability than a basic plastic-geared servo drivetrain will. However, be sure to consider the choice of which servo to use wisely, as their specifications can vary considerably.

You should also keep in mind, that when using a double-servo configuration, you need to add the torque rating of the two servos together to give you total turning power. I also recommend keeping both servos the same as two different servos, with their slightly different specifications, will end up fighting each other and run the receiver pack down quicker. There is also the risk of one servo burning the motor in the other out.

Servo Saver

Depending upon the servo you purchase, don't forget that you may need to change the servo saver or servo horn. Different servo brands have slightly different servo output shafts, so without matching the servo saver/horn properly you'll experiance problems. For more information regarding this, see my section on servo savers and servo horns.

Servo Screws

If you happen to loose your screw that attaches the servo saver onto the servo, you can buy replacement screws easily. Hitec and Futaba servos use a 2.6x8 screw. JR servos should use a 3mm screw, although the exact length needed will be determined by the servo saver used. This set provides several sizes to choose from.

You can also use a 2.5x8 screw, and use some thread lock as the screw will have a small amount of play. The link provided also makes the screw a hex head. The exact length you need, will be determined by the servo saver you use, as some may require something slightly longer. For instance a Kimbrough servo saver will work better with a 2.5x10 screw.

I do not have the screw size needed for anything other than the servos mentioned above, so you can take the servo to your local hobby store and have them match it up with a replacement. If you would happen to know the size e-mail me at eric@misbehavin-rc.com, and I'll add the information to this page.

Part One:	Introduction
Part Two:	Differences and Compatibility
Part Three:	Installation Tips
Part Four:	Recommended Servos
Part Five:	Servo Comparision