Yanmar 1GM/1 GM10 replacement with a Nanni N2.10 or N2.14
The time has come to replace your time served single cylinder Yanmar 1GM /1GM10.
A popular replacement choice is the Nanni N2.10 or the more powerful N2.14 Kubota based twin cylinder indirect injection engines.
Which to choose? Will your boat benefit from a little more power, or do you require the larger 70 amp alternator as the N2.10 has 40 amp, do you want the A4 dash panel with the rev counter, not forgetting the oil sump pump fitted, Then the N2.14 is the best option. (we can fit the N2.10 mounts to the N2.14 to make the install easier.
The next question that comes to mind is how complicated it is to replace your current engine.
Will the new engine physically fit? What will be the increase in weight?
1GM is 554mm long and 385mm high with a weight of 71kg
Nanni N2.10 is 558mm long and 395mm high with a weight of 87 kg
The engine mounts on the N2.10 are set to be the same width and drop as the Yanmar.
(the N2.10 mounts can be fitted to the N2.14)
So nothing to worry about there.
Things that you will need to do. Replace the propeller shaft coupling for a standard
4in coupling, this can be done with a R&D clamp on coupling together with a R&D flexible drive coupling.
As the Nanni is an indirect cooled engine and the Yanmar is a direct cooled engine. You may need to fit a bigger water intake fitting, The Nanni requires a ¾ in intake, commonly the Yanmar will only be 1/2in. (A big benefit is the Nanni will run a calorifier for hot water)
The current exhaust size is 45mm and the Nanni is 40mm so a small reducer will sort this out.
Click On The Image To Enlarge Diagram
Click On The Image To Enlarge Diagram
The Nanni comes with a replacement dash panel and loom so this is all plug and play.
You are almost there, the Nanni requires an 8mm feed and return fuel line similar to the Yanmar. Throttle and gear cable connections should be roughly the same position,
If you go for the N2.14 you won’t need the stop cable as this engine has an electric stop.
Propeller
This will depend on one, the ratio of the original gearbox and what size is fitted.
We will also want to know the type and model of the boat.
With that information we can recommend the correct size.
To see the full specification of our N2.10 and N2.14 Engines in the current engine range, use the links below:
N2.10
N2.14
