On our attempted first sail I noticed that the coolant level was low or not at all. Any ideas on the capacity. Yanmar 2GMF - Hunter 91 30T ?
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The long and short of it.
Prior owner says that the 'Closed-Loop' fresh water cooling system should be drained and refilled every second year. (In the 'olden days' I did that wiyh all of my cars ... no longer seems necessary. He gives this description of draining proceedure: a) With the engine at operating temp, but NOT too hot, slowly remove the cap on the expansion tank. b) remove the pressure cap. c)Loosen 3 drain plugs of the (1)engine, (2)air cooler, (3)heat exchanger. Need a small jar and a 1 gallon jug for the waste. d) use a 50/50 mixture of automobile anti=freeze and water to refill 1/2 gallon each. Quick answer is 1 gallon. The YANMAR manual says that the cooling water capacity is 2.9 L. I personally don't belive that is equal 1 gallon, based on the flush capacity of a modern urinal ie, "1G/3.8L". Have fun ... "It's all part of the adventure"
Prior owner says that the 'Closed-Loop' fresh water cooling system should be drained and refilled every second year. (In the 'olden days' I did that wiyh all of my cars ... no longer seems necessary. He gives this description of draining proceedure: a) With the engine at operating temp, but NOT too hot, slowly remove the cap on the expansion tank. b) remove the pressure cap. c)Loosen 3 drain plugs of the (1)engine, (2)air cooler, (3)heat exchanger. Need a small jar and a 1 gallon jug for the waste. d) use a 50/50 mixture of automobile anti=freeze and water to refill 1/2 gallon each. Quick answer is 1 gallon. The YANMAR manual says that the cooling water capacity is 2.9 L. I personally don't belive that is equal 1 gallon, based on the flush capacity of a modern urinal ie, "1G/3.8L". Have fun ... "It's all part of the adventure"
Alarm is off and we are sailing
Thanks for the info... It worked the alarm went off and so did we. Great weekend ot be out on the bay. Thanks again.
Thanks for the info... It worked the alarm went off and so did we. Great weekend ot be out on the bay. Thanks again.
Fresh water cooled 2GM20F
The antifreeze side of the cooling system obviously has the thermostat, and when refilling you need to get the coolant into both sides of the thermostat. I do so by loosening a hose adhacent to the thermostat to release the air bubble and get antifreeze down to the top of the thermostat. Then after the system heats up and achieves a 'balance' your antifreeze level in the overflow tank and filler neck will have to be refilled.
The antifreeze side of the cooling system obviously has the thermostat, and when refilling you need to get the coolant into both sides of the thermostat. I do so by loosening a hose adhacent to the thermostat to release the air bubble and get antifreeze down to the top of the thermostat. Then after the system heats up and achieves a 'balance' your antifreeze level in the overflow tank and filler neck will have to be refilled.
If your engine is
the Yanmar 2GM20F, the fresh water/coolant capacity of the system is 2.9 liters. The expansion tank takes another .8 liters.
the Yanmar 2GM20F, the fresh water/coolant capacity of the system is 2.9 liters. The expansion tank takes another .8 liters.
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