Scale Jet Unit

About using jet ski motors to power small boats

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Scale Jet Unit

Post by boat-bill-der » Wed Oct 24, 2007 1:46 pm

You guys might have noticed I am all about building scale models...

I thought this product was really cool, and this might be a good test to build a scale hull and see what mods are required, and how it works.


Post by upspirate » Wed Oct 24, 2007 6:26 pm


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Post by leakcheck » Thu Oct 25, 2007 3:49 am

That is too cool !! ..Sometimes I wished I lived in Gullivers world !


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steve crawford
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Post by steve crawford » Thu Oct 25, 2007 4:25 am

Those are hot , I'll bet if you hook up a gas engine to it you'd burn the pump up with al the extra r's.

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Post by kirkp » Thu Oct 25, 2007 5:03 am

Would they burn up with a gas engine? I ask because I'm not sure what RPM a gas engine turns at. Looking at the electric engine they recommend, it has a no load RPM of 19,000 and a load RPM of 7700.

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Post by boat-bill-der » Mon Oct 29, 2007 1:00 pm

I think it actually does say for electric only, but who knows what would happen... Does anyone actualy follow the directions anyway?

Even a small marine nitro looks like the RPMs are pretty high, but they do have a reduction gearbox...
From Tower Hobbies:

This is the OS Max 15CV-M Inboard Marine Engine Used for Scale or Sport Boats.
It is a Marine Version of the Popular CV Buggy Engine.

Due to the high-performance nature of this engine
it is NOT covered by any warranty.

FEATURES: Schnuerle Porting
Water-Cooled Cylinder Head
Twin Ball Bearing-Supported Crankshaft
ABC Type Construction (Aluminum Piston with a Chromed Brass Cylinder)
Side Exhaust
#10E Rotary Carb with Plastic Throttle Arm
High and Low Speed Needles (Flat-Head Screwdriver Adjustable)
Reinforced Front Crankcase Webbing
Gray One-Piece Crankcase
Rotatable Carburetor Secured by a Pinch Screw Retainer
Reinforced Rear Backplate (Coverplate)

INCLUDES: One Assembled .15 CV-M Engine with Carb, Prop Nut and Drive Washer,
One Operating Instructions Sheet, Decals, and Warranty
One #A3 Glow Plug with Copper Washer (Not Installed)

SPECS: Displacement: 2.49cc (.152 cubic inch)
Bore: 15.2mm (.598")
Stroke: 13.7mm (.539")
Weight: 167 grams (5.89 ounces)
Power Output: .6 BHP at 22,000 RPM
Practical RPM Range: 3,000 - 25,000 RPM
Crankshaft Thread Size: 5mm
Length: 58.5mm (2.30") (Backplate to the Front of the Drive Washer)
11mm (0.434) (Center to Center-Front to Rear Mounting Holes)
Width: 40mm (1.57") (Overall-Flanges Included)
31.4mm (1.24") (Between the Centers of the Mounting Holes)
Height: 65mm (2.56")

REQUIRES: Glow Fuel with AT LEAST 18% Lubricant Content and 5%-20% Nitromethane
Flywheel (OSMG2637), Universal Joint Assembly (OSMG6626),
and Tubing.

COMMENTS: Also In A Recoil Starter Version, Use .15CV-X (OSMG1619).
AXY 4/13/99
updt 12/12/03

Click here for Units of Measure Conversion Calculators

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