| I am new to RC...recently aquired a MRP Mach 1 tunnel hull w/ a K&B
3.5cc outboard. (It's not broken in, yet.) Boy, I normally like
winter, but I can't wait for open water!
A couple of ??'s:
I have access to a friends pool, but I'd be very leary of sending
this boat on it's (my) 1st voyage on such a small body of water.
1) While breaking your's in, I take it that you (hand ?) held the boat, at
a stand-still to give the engine somewhat of a dynamic load?
2) Aren't you concerned about the prop cavitating in the water, and
*not* giving an appropriate load?
3) Is 40% nitro an OK mix to use for outboard break-in? (This is what
the shop outfitted my buddy with!)
4) Considering the danger involved with a hand held (running) boat, I
was considering making a mount for the engine to "bench test/tune" in a
bucket (i.e. similar to large outboards in a 55 gal. drum?). Has
anybody done this or have any inputs as to what to watch out for? (i.e.
cavatation, roost, different props, etc?)
5) I understand your theory of syphone-feeding water to the engine for
cooling... My set up has a pick-up aft the prop...it's supposed to
use the roost as pressurized water to feed up to the head. Is this
not sufficient in your "pool" set-up?
RE: muchly appreciated!
Stick
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| DON'T use 40% nitro to break in your engine! You WILL overheat it and
cause major trouble to it. You can use the 40% nitro after you break it
in. Use 5 or 10% nitro. The lower it is the better for break in.
Remember that the engine shouldn't be so hot that you can fry an egg
on it!
Also you are going to need a large, large body of water. I would
recommend a club to assist you as this model when going fast, is
dangerous.
By the way I have a Pay-n-pak Unlimited Hydro & a Dumas Swamp buggy.
Steve M
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