How do I winterize my marine engine in the boat: Tips and guidelines

How do I prepare my marine engine for winter? In this blog I will take you through the process of preparing a ship engine for winter. It is very simple (Yes, really!), but it is important that you know what you are doing before you start. Let's start with the question: What do I need to winterize my marine engine?

- Antifreeze ( Concentrate or mixed ) Make sure you look carefully at the freezing point of the Antifreeze, in the Netherlands -26 is generally more than sufficient.
- A large funnel
- A full starter battery ( Also good to keep the batteries warm and dry in winter store )
- A 2nd person to help youthis will make the process a lot easier

If you have all the above products together we can start winterizing the engine.

Step 1: Close the raw water tap of the engine cooling
Step 2: Open the throwing pot
Step 3: Now fill the throwing pot to the brim with antifreeze
Step 4 : Turn on the outside water tap and wait until the antifreeze has subsided. Step 4: Close the outside water tap again and check whether you can visibly see the antifreeze up to the tap. If not, repeat steps 3 and 4.
Step 5: Fill the throwing pot with antifreeze again and have person 2 start the engine
Step 6: Pour antifreeze into the throwing pot until you see visible antifreeze coming out of the exhaust the required amount of antifreeze depends on the size of the cooling system.
Step 7: Fill the jar to the brim with antifreeze
Step 8: Close the jar again
Step 9: Congratulations! You have now prepared your ship's engine for winter independently! Read below how to make your motorcycle ready for summer again!

Additional tips:

Tip 1: For engines with intercooler (Heat exchanger), always check the freezing point of the coolant and replace if necessary.
Tip 2: Only replace the impeller after the winter , some antifreeze types are harmful to the Nytril rubber of the impeller.

This is how you prepare the engine for summer!

Step 1: Replace the impeller
Step 2: Turn the seaweed filter open and fill it with water (If possible)
Step 3: Close the seaweed filter again
Step 4: Open the sea water tap and start the engine. Always check whether cooling water comes out of the exhaust!

Can't figure it out or do you have any questions? Please feel free to contact us!