not able to start motor to winterize. Is there a way to drain raw water from yanmar ysm12 to keep block from freezing?
winterizing ysm12
- Thread starter 142 riverview
- Start date
not my model engine, but the 3GM series has two brass valves with clear hose on it to drain the exhaust manifold (or raw water side of the heat exchanger) and the block. Your model might be similar, be careful not to break them.
you will also need to drain your lift muffler and your sea strainer.
you will also need to drain your lift muffler and your sea strainer.
Check the forums for winterizing your engine and boat. There has been volumes of how to helpful ideas over the years.
Here are two link’s that may help you with the tasks.
Here are two link’s that may help you with the tasks.
Engine Winter Freeze Protection - Marine How To
This Came Out of a Boat Stored Winters in Maine I got a call from a customer who felt his motor was running a little hot in the fall and thought he should address it during the off season. We decided to pop the caps off the heat exchanger,
marinehowto.com
Freshwater System Winterizing - Marine How To
What Not To Use For winterizing your fresh water system you will need a few items. The number one item to have is RV type propylene glycol antifreeze that is safe for domestic plumbing systems. Unfortunately, I see this type of alcohol based RV type product all too often.
marinehowto.com
Can't understand why you can't start the engine? Can you elaborate?
I used to winterize mine on the hard, I'd pull the hose from the through hull, drop it in a pan with antifreeze, run engine until enough antifreeze went through.
dj
How would you make sure you don't pump antifreeze into a cylinder? With the engine running, the exhaust pushes everything the right way... Isn't that engine raw water cooled? No heat exchanger?
dj
Generally not a good idea. Suffice it to say engines aren’t designed to resist positive pressure of an external pump. If you want a further explanation, ask.
I don't know that engine but if it's fresh water cooled, maybe try putting the raw water hose in a bucket of antifreeze, remove the impeller from the raw water pump, and replace the cover, then use a shop vac on the exhaust through-hull to draw the antifreeze through the cooling/exhaust system. Or remove hoses and vacuum one section at a time. I'm not too familiar with raw water cooled but I think you can remove the thermostat drain the block and try a shop vac on the system.
Last edited:
motor is unable to start as it has been removed from engine bay and is resting in salon area. I was able to drain raw water strainer intake and should be able to either blow out or pour anti-freeze into exhaust muffler, just not sure how to drain block. my manual shows a drain cock on bottom of cylinder head but my engine does not appear to have that.
You'll find complete instructions for winterizing both the fresh water system-- with or without antifreeze-- and the sanitation system in the Plumbing and Sanitation forum.
--Peggie
--Peggie
thanks for the links to winterizing boat engines, was not aware that there was different types of R/V and marine anti-freezeCheck the forums for winterizing your engine and boat. There has been volumes of how to helpful ideas over the years.
Here are two link’s that may help you with the tasks.
Engine Winter Freeze Protection - Marine How To
This Came Out of a Boat Stored Winters in Maine I got a call from a customer who felt his motor was running a little hot in the fall and thought he should address it during the off season. We decided to pop the caps off the heat exchanger,marinehowto.com
Freshwater System Winterizing - Marine How To
What Not To Use For winterizing your fresh water system you will need a few items. The number one item to have is RV type propylene glycol antifreeze that is safe for domestic plumbing systems. Unfortunately, I see this type of alcohol based RV type product all too often.marinehowto.com