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Old 01-31-2017, 06:10 PM   #1
trader76's Avatar
City: Fort Lauderdale
Vessel Model: Marine trader
Join Date: May 2016
Posts: 2
Closed water flush

We have Lehman 120s and need to flush fresh water system to change antifreeze. Problem is I am not positive where the drains are located on the motor. Manual is not very specific. If you have done this, can you advise the best way to purge the old antifreeze and where the drain valves are located?

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Old 01-31-2017, 06:38 PM   #2
RT Firefly's Avatar
City: Slicker?
Join Date: Oct 2007
Posts: 15,552
Mr./Ms. 76. Welcome aboard. Oh golly, drains...To the best of my poor memory the drain on the starboard motor is inboard between the forward end of the starter motor and the oil pressure switch right on the block. Should be staring you in the face. Can't remember if the port engine is the same (on the starter motor side) or if the drain is mirrored inboard.
You'll have to drain the heat exchanger and I think the exhaust manifold as well (not sure about the exhaust manifold).
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