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Craftsman Marine CM2.16 Diesel Engine with Keel Cooling
The Craftsman Marine Mitsubishi based diesel engines can also be fitted with keel cooling. This can be very beneficial for sailing through shallow or muddy waters or for shallow draft boats sailing through waters with limited depth.
Due to unparalleled quality and superior service backed by decades of experience, these keel cooling engines are the perfect solution for smooth sailing through waters where mud, sand or debris can potentially damage and clog up a conventional water cooled system.
Our keel cooled engines are engineered using the latest cooling technology. Simply put, there is no need for a raw water pump, so eliminates one more service point from your engine. These engines reduce maintenance costs and minimise downtime.
Using keel cooling, only the cooling liquid will be pumped through the engine and the keel cooler element by the engine water pump. As a consequence, a keel cooling engine requires a heat resistant exhaust system.
| Basic Engine | Mitsubishi |
|---|---|
| Cylinders | 2 In Line |
| Cylinder Capacity | 635 cm³ |
| Power | 11,8 kW / 16 hp |
| Max. Engine Speed | 3.600 rpm |
| Max. Torque | 36 Nm |
| Aspiration | Natural |
| Alternator | 70 A / 12 V (Bosch / SEG) |
| Cooling System | Keel Cooling |
| Flexible Engine Mounts | CM Type 2 |
| Calorifier Connection | Optional |
| Exhaust Diameter | BSP G11/4 thread |
| Electronic Protection | 10 A Circuit Breaker |
| Stop Solenoid | Energized To Stop |
| Max. Installation Angle | 15° (Backwards) |
| Weight | 90 kg |
| CM2_spareparts_catalogue_web |  |
|---|---|
| CM216_CM327_manual_web_DE | |
| CM216_CM327_manual_web_DK | |
| CM216_CM327_manual_web_EN | |
| CM216_CM327_manual_web_FI_v2 | |
| CM216_CM327_manual_web_NL | |
| CM216_CM327_manual_web_NO | |
| CM216_Engine_with_ZF10_GearBox |  |
| CM216_performance | |
Applications & Compatibility
Keel cooling on the CM2.16 fits vessels operating where a raw water intake is a liability:
- Small sailboats and shallow-draft launches cruising muddy or silty waters
- Canal and inland-water boats where debris can clog a conventional raw water system
- Compatible with the ZF10 gearbox setup for straightforward drivetrain integration
- Retrofit projects moving a shallow-draft build away from raw water cooling
Built for Boat Builders & Dealers
Distributors and boat builders work with Craftsman Marine on more than a single engine order. The CM2.16 Keel Cooling draws on the same Mitsubishi base as the standard CM2.16, which keeps parts sourcing simple in almost any market, and its documentation ships in six languages, so a regional service team never has to translate a manual first. Standardized specs across every unit make it straightforward to plan OEM runs or bulk stock, backed by the distributor network Craftsman Marine maintains worldwide.
Technical Advantages
Swapping to keel cooling changes a specific set of maintenance points on the CM2.16; here’s what that actually removes or alters:
- No raw water pump needed, removing one service point from the cooling circuit
- Only cooling liquid circulates through the engine and keel cooler element
- Reduced fouling and clogging risk in muddy, sandy or debris-heavy water
- 10 A circuit breaker for straightforward electrical protection
Why Choose the CM2.16 Keel-Cooled Marine Engine
Dealers reach for the CM2.16 Keel Cooling specifically for customers in shallow, silty, or debris-prone waters, where removing the raw water pump eliminates a recurring service call- not a different sales pitch, just a different cooling answer on the same reliable base engine.
- Mitsubishi-based industrial engine platform, proven and supported worldwide
- Keel cooling removes the raw water pump as a maintenance point in silty or shallow waters
- Heat-resistant exhaust system matched to the keel cooling configuration
- Complies with RCD II regulations for recreational craft
- Compact 90 kg build with CM Type 2 flexible engine mounts for straightforward installation
Frequently Asked Questions
No. Output stays at 11.8 kW (16 hp) from the same 635 cm³ Mitsubishi block, only the cooling method and exhaust connection (BSP G1 1/4 thread, for a heat-resistant exhaust) change from the standard CM2.16.
It eliminates the raw water pump entirely, since only cooling liquid circulates through the engine and keel cooler element, useful in muddy, sandy or debris-heavy water where a raw water intake tends to clog.
No, it uses the same CM216/CM327 manual set as the standard CM2.16, available in six languages in the Downloads section on this page.
The ZF10 gearbox, the same pairing used on the standard CM2.16; drawings are listed in the Downloads section.
Yes, that’s the primary use case, shallow-draft sailboats and inland-water boats where a conventional raw water system risks clogging on mud, sand or debris.
There is none, both weigh 90 kg on CM Type 2 flexible engine mounts, with the same 15° maximum installation angle.