The new TOP KEEP .21-M DD in-line marine direct drive engine (from Novarossi) is here! At this point the first batch of production engines are arriving to the dealers. Novarossi have used the same technology solution as they did on the TO-BE .46DD engine. As in, basically using an outboard power head with a new secondary "slave" crankshaft and flywheel assembly where it earlier would have been bolted to the outboard lower unit.
- Capacity: 3.50ccm
- Bore: 15.88 mm
- Stroke: 17.60 mm
- Sleeve: 9 ports
- Crankshaft: 14.5 mm
- Front ball bearing: Steel
- Rear ball bearing: Ceramic
- Glow Plug: Turbo C8TGH
The conrod is made from superlight & superstrong alluminium to make
the lightest and strongest possible conrod to withstand the abuse of a
The sleeve has 9 transfer ports and an exhaust with booster ports. The
special shape and positioning of the ports, covered by a patent, improve
the internal fluid-dynamics to obtain the maximum possible performance.
This is a special Crankshaft. Made to meet even the highest standards of
our most demanding drivers. Slightly reduced rotational mass and
greatly improved fuel flow provide great performance.
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