Closed water flush

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trader76

Newbie
Joined
May 2, 2016
Messages
2
Location
USA
Vessel Make
Marine trader
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?
 
Greetings,
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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