(nooB Help) Question: I recently purchased a OS max .65 nitro engine. My 3' hull so far has one water pick-up (transom mounted). The engine has multiple coolant chambers: 1 on head, 2 on exhaust manifold, and 1 on cylinder chasis. Would a single pickup with tubing to a single exit port be enough to cool the engine? Or should I connect another port and p-up? I was considering a second p-up mounted on the rudder to push water through 1 of the chambers in the exhaust mainfold, and the chasis, while the one that is already on the transom can be used for the head and other manifold chamber. Which is better? Which will guarantee better performance? Which is better concerning engine life? I've been RTR'ing for awhile but this is my first build. Help is appreciated! Thanks.

http://manuals.hobbico.com/osm/61-65-81vr-m-manual.pdf There you go. Schroll down for the picture

A .65 in a 3 foot long hull and you are new to boating!! That's a lot of engine for such a small hull. A .40 - .45 is more suited for that boat. But regarding the cooling water routing, the schematic that Rosey shows will work. If you find that the engine is running hot, add another pickup and run a seperate circuit for the head only with it's own discharge.