Boatngo, simplify the maintenance of your boat


Guide: the maintenance of your inboard engine in 10 steps.

The inboard engine, is a category of engine that is located inside the hull of your boat. It is generally more difficult to maintain than an outboard motor and is noisier.

Néanmoins, il reste très recommandé pour les bateaux à vitesse moyenne et dont les durées de navigation sont conséquentes. Indeed, its center of gravity is optimized against the pitching and thus allows a good handling.

It is necessary to service your inboard motor before the start of summer or before winterization.

However, before winterizing your vessel, it is IMPERATIVE to to respect certain rules such as...

Enfin, bien que l’entretien des moteurs in-bord soit réputé être plus contraignant, Boatngo vous allège le travail en vous livrant the 10 steps to follow for the good maintenance of it.

Table of contents

General study

Before you begin, it is important to do a general survey of the engine. Check the most important components for leaks around the engine and bilge.

Take the time to observe the condition of your belt and make sure there is no rust.

Passez ensuite à la partie électrique en vérifiant d’une part, la batterie afin de prévenir la corrosion et d’autre part, l’état de votre circuit électrique en mettant l’accent sur l’embrayage. Vérifiez ensuite les pieds de moteur pour prévenir la présence de fissure ou de corrosion.

Use of additives

Add additives to stabilize the performance of your vessel. 

Indeed, additives preserve the fuel from various bacteria or dirt to keep it clean and extend its life. 

As for the dosage, just follow the instructions for use and respect the dosage recommended above.

Engine test

Start the engine and let it run for a few dozen minutes without forgetting to leave the hull valve open and the main switch turned on.

On the one hand, the additive will spread well in the engine and on the other hand, you can also proceed to an analysis while the engine is running in order to detect problems such as abnormal noises, leaks etc.

Before turning off the engine, make sure that the propeller cover is cool to the touch because if not, it means that there is a problem with the cooling system.

Replacement of the particle filter

Its purpose is to filter out various small residues :

  • Place rags under the filter to prevent leakage.
  • Gently remove the filter.
  • Clean the sealing surface.
  • Moisten the sealing ring.
  • Attach the new filter.

Purge of the particle filter

When you change the particle filter, air enters the system. It is therefore necessary to evacuate it :

  • Loosen the bleed screw without removing it.
  • Move the fuel supply palm until bubbles come out at the screw.
  • Continue the movement until the bubbles stop and clean the remaining bubbles.
  • Tighten the bleed screw.

Changing the engine oil and oil filter

This is a process that must be done every year :

  • Remove the oil dipstick.
  • Pump oil through the dipstick hole.
  • Gently remove the oil filter.
  • Clean the sealing surface.
  • Moisten the sealing ring.
  • Attach the new filter.
  • Pour in the new oil.
  • Replace the dipstick and check the oil level.

Replacing the transmission oil

It is also a process to be done every year :

  • Remove the oil dipstick.
  • Pump oil through the dipstick hole.
  • Pour in the new oil.
  • Replace the dipstick and check the oil level.

Examination of the timing belt

It is IMPERATIVE to check the condition of the timing belt in order to prevent it from breaking or becoming dislodged in the event of an incorrect tension adjustment. To replace it or simply adjust its tension, you just have to play with the alternator fixing screw that you will tighten or loosen to make your manipulation.

For proper voltage adjustment, there are two fairly simple ways to determine abnormal voltage.

First, you will hear abnormal noises, second, when you press the longest line, you will either move the line too much (little tension) or not at all (too much tension).

Washing of the sea water filter

It is possible that there is residue in the seawater filter :

  • Loosen the cover.
  • Remove the sieve.
  • Clean the sieve.
  • Clean the housing.
  • Replace the sieve.
  • Retighten the cover.

Final examination

Une fois que vous avez fini toutes vos opérations, il est nécessaire de faire un dernier examen de votre bateau. Start the engine and let it run for about 20 minutes while checking all the components you just repaired, cleaned or replaced. You can then, Turn off the engine and check the engine and transmission oil dipstick.

What you need to remember !

En bref, retenez qu’un moteur in-bord est une pièce qui nécessite un entretien certes, plus complexe que celui d’un moteur hors-bord cependant, it is just as easy to learn how to do it well with a minimum of willpower and attention.

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