GRAY Engine Specification Table

This table was created to help people determine what
horse power engine they have.

The data is a accumulation of data from the different
brochures and manuals on the web page, including the
Termaat and Monahan brochures.

There appears to be slight differences of the same horse power
engines from different model years of GRAY and T&M engines,
with regards to the flywheel diameters, and the weights of the
engines, but the "Bore and Stokes" seem to remain the same.

If you find errors, or can add to the information, please let me know!

H.P. Bore x Stroke Net Weight Shipping Weight in L.B.S. Flywheel Diameter
1 3 x ? 200 300 15"
1-1/4 3" x 3-1/2" abt. 200 240 15"?
1-1/2 3-1/2" x 3-3/4" 235 250 to 315 15-3/8"
1-3/4 3-1/2" x 5" 235 270 17"
2-1/2 4-1/4" x 5" 400 450 22"
4 4-3/4" x 6" 660 700 25"
6 6" x 8" 1200 1400 34"
9 7" x 9" 1700 1900 36"
12 6-1/2" x 11-1/2" abt. 2275 2500 42"
18 9-1/2" x 12" 3051 3291 48"
25 12" x 12" 5600 5900 52"


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