The motors both turn in the same direction (counter-clockwise) and thus use Left Handed propellers. The replacement props come in pairs (PBR3621). The Proboat (PRB3510) may be the single version, butI'm not sure. Plenty available on Ebay. I've heard they break easy and most people upgrade to metal props.

Converting it to counter-rotation will require a LH and RH prop. I'm not sure if the timing on the motors are the same when one of them is re-wired for reverse running. The real PT boats had props that turned in the same direction, Surprise!!

What type of propsshould you upgrade too? There are many solutions. I don't know how much you're willing to experiment.

http://www.cornwallmodelboats.co.uk/...ropellers.html

The 35mm M4 (4mm) threaded plastic props look like good replacements, but maybe you want better.

You have plenty of standard 3-blade 35mm M4 brass props from Raboesch and Rivabo.

Should you maybe opt for the 3-blade 35mm M4 "skewed" prop that is more suited for high speed patrol? The ProBoat plastic props do have a "skewed" look to them.

What about a 35mm M4 4-bladed propellers. They also come in a skewed version as well.

I would try the 3-blade 35mm M4 "Skewed" style. Part No: RAB160-04 (Left hand) You will need to order a Right hand and Left hand if you want counter-rotating.


For batteries, a pair of 7.2v 4200mAh Duratrax NiMH is what I use. Duratrax makes a 8.4v 4200mAh NiMH with 7 cells, for an extra boost in performance.

I have only used the factory battery trays near the rear of the boat since I've owned it. The battery trays are actually a part of the boats inner wood structure just in front of the rudder shafts. 7 cell battery packs will fit.


I have never tried ballast, but I haven't run it that much yet.


ProBoat seems to have run into a motor mount shortage. A PRB4211 should work just fine. You can find them on Ebay.

The is shaft coupler is 4mm on one end and 1/8" (3.175mm)on the other. You have an M4 shaft (4mm) and the motor is 1/8" (3.175mm). You have to buy the shaft kit to get them (PRB3605)










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