Question: How much does the 46PRO weigh? Is the 52PRO heavier? Is the 52PRO bigger? What are the dimensions of each?

Answer: The 46PRO and 52PRO are the same size and they both weigh as follows:

• Engine without muffler 13.6 oz (386 grams)
• Muffler 4oz (114 grams)
• Engine with Muffler 17.6 oz (500 grams)

These weights are accurate to within +- 5%.

Better Answer: The 52PRO is based on the 46PRO. It uses the same crankcase. They are the same size physically and are bolt compatible. If a 46PRO fits, so will the 52PRO. The crankcase of the 52PRO has been bored out. The cylinder and piston of the 52PRO are slightly larger in diameter. The result is that the two engines are exactly the same physical size and weigh practically the same with the 52PRO weighing 1-2 grams less.

For people who like to buy in big volume... a case of 24 engines weighs approximately 39 lbs (18 kg) and measures 20.5x15x15in. (807x381x381mm). Case volume is 2.67 cubic feet (.1171 cbm).

The Operating Manual that comes with the each engine includes an Exploded 3-View and a case dimensions chart for reference. This manual can also be downloaded from http://www.richmondrc.com/vma/vmax.htm.