What size motor is in my rcb36b2a - Amana PTH123B35AJ Air Conditioner

If you reduce the supply pulley diameter, yes.

Well, I don't know about the size, but I do know you can find a replacement motor for $41.99 here:

http://www.sewingpartsonline.com/motor-singer-416593001.aspx

i would try replacing contacter first.

Go to a Honda Store with all the info & numbers
The parts dept will answer that

Its one of three, (1) 3.8 SC OHV, (K) 3.8 OHV, or (M) 3.1 OHV. The eighth character of your cars VIN represents its engine size. The character in parentheses listed prior to the motor sizes above represents the eighth character of the VIN. Just look at your VIN and match it to the above motors.

I wouldn't consider rewinding a motor of that size unless it's impossible to get a replacement, in which case I'd modify the pump to take a common motor.

It's cheaper to build a small motor than it is the rewind it- it's quite a job to rewind a motor, and small motors are hardest.

Look on the motor tag- you should see RPM, HP and Frame Size. These are the three things you need to know to replace the motor. If the shaft is odd, as it sometimes is in pump motors, you can always just replace the entire motor stator- the housing with the laminations and windings, with one from a different motor of the same brand, frame size, HP and RPM. Again, cheaper than rewinding the motor, but a little more work than just replacing it.

lp

The fan blade size, pitch, rpm, number of blades and diameter, determine the motor size and rpm.
If your condenser says it should be 1.6 amps and you have 2.3 amp motor in the unit, you have a stronger motor than you need and the motor should not be getting hot and shutting off.
You need to make sure somebody didn't change the blade or the rpm of the motor or the rotation or direction the motor turns. If those are correct then you need to make sure you have the right size capacitor, The size (microfarads and volts) is usually on the motor nameplate. If it's the right one then you need to have it checked and make sure it's good.

What model and size is the compressor, one thing to check that is easily overlooked when changing the motor is check the rpm of the old motor and the new one, they should be the same! I have seen people replace a 1800 rpm motor with a 3600 rpm motor and not catch it when they made the change, in that application the motor would overload as it is trying to do twice the work with the same size sheave.

Motor Guide hubs come in two different sizes - 3" and 3.5". The 3" size is more for older and lower thrust models. Newer units use the 3.5. The size differences are between manufacturers too. MinnKota's are a little bigger. If you order a new prop, the only issue may be the depth of the prop. I had to use a longer prop nut wrench to tighten the Hydrilla Hacker I purchased.

Triton72