New engine for MS Passi

[Pascall]

New engine for MS Passi

This year a new engine will be installed in our 29-year-old boat.
It will be the third new engine in its existence.

The first engine, 1996 to 2010, Nanni (Kubota) 60 hp 6 cylinder 6000 hours.
This engine was worn out after 6000 hours and would have needed a thorough overhaul.

The second (current) engine, 2010 to 2025, Nanni (Kubota) 100 hp 4 cylinder will be replaced in October, the number of engine hours will then be approximately 6800 hours.
The current engine is still in very good condition!

The reason for replacing it is a calculation.
We sail average; 12.800 hours divided by 29 years is 440 hours per year.
We hope to enjoy our boat for another 20 years, which would mean that the current engine is then 35 years old with about 15.500 on the hour meter, which is quite an age and considerable number of engine hours.
There is a real chance that the current engine will not reach the age, number of engine hours or that large costs will have to be incurred.
From this point of view, we decided to replace the engine in order to enjoy the benefits of a new engine to the fullest.
Because we sail a lot on open water, safety also plays a major role, and what has also been decisive in this decision is our own age.
Now I can still do the replacement of the engine myself, at a later age that is still the question.
Another favorable side effect is the resale value of the engine that is still in good condition.
For the new engine, a Nanni was again chosen with a Kubota block as a base.
The reason for the choice of this motor is that dimensions are very close to the current motor, all connections are also in the same place.

The new engine (Nanni N4.115, 115 hp) will be delivered soon, after delivery I will adjust the engine to our wishes, this includes is; coating the heat exchangers, manufacturing a partly dry exhaust, bypass for injecting the cooling water into the exhaust, second alternator, Senta damper plate with back-up, providing the engine with a good coating (paint system) and various minor adjustments.

We first want to make a nice trip with the current engine, after that we will start installing the new engine.

I want to share the modification and installation of the new engine with you in this topic, to be continued.

Greeting,

Pascal.

 

[BruceK]

Congratulations, your engine longevity is surely a reflection of personal adjustments at installation and good maintenance thereafter.Does the serial power increase, 60 to 100; 100 to 115, come from an identified need or from manufacturing availability?

 

[Pascall]

The reason for choosing a heavier engine comes from the fact that the 60 hp died after 6000 hours.
My expectation was that this engine would reach 10,000 hours without any major problems.
The 60 hp was an engine without nonsense, no turbo, no electronics, no charge air cooler, so expectations were high.
Probably a combination of the design of the engine and too little power for the size of the ship that it died prematurely.
For that reason, we opted for more power for the second engine.
The current engine is 100 hp with a rating 4, so actually 70 hp which the engine can deliver 24/7 without it becoming a wear and tear.
The choice for the 115 hp stems from the following reason; As said all connections correspond to the current engine, the second reason, next engine under 115 hp is 84 hp and we thought that was too little.
Helaas is de huidige motor niet meer leverbaar, anders hadden we voor dezelfde gekozen.

Here is the cost;
Nanni 115 hp with gearbox (twindisc Technodrive) 31,385,- euros.
Trade-in of the current engine, 12.000,- euros.
In the end we come to 18,000,- euros, to which are added the costs of a second alternator and some small parts.

Greeting

Pascal.

 

[Pascall]

Here is a recent photo of the current engine.

 

[Pascall]

The postman came with a beautiful box!

Pandora's box, luckily not the mutineers came out of it but this pretty blue beauty.
First action was to drill a hole in the flange connecting the engine and clutch.
This hole is for inspecting the Centa damer plate for wear.
The hole (18mm) is large enough to insert an endescoope, this avoids having to remove the gearbox for inspection.
The Centa damper plate is also fitted.

To be continued.

Greetings,

Pascal.

Translated with DeepL.com (free version)