BrileyR Posted March 28, 2011 Share #1 Posted March 28, 2011 I noticed coolant leaking from the left rear cylinder... http://i868.photobucket.com/albums/ab243/BriRit/2011-03-28_16-40-52_203.jpg I removed the side cover from the cylinder and found this brass looking plug leaking coolant. What is it, and how do I fix it? http://i868.photobucket.com/albums/ab243/BriRit/2011-03-28_16-45-54_601.jpg Link to comment Share on other sites More sharing options...
dingy Posted March 28, 2011 Share #2 Posted March 28, 2011 The brass threads are only there to assist in removing plug. A spark plug end will thread in there and it will pull straight out. This goes to the cavity surrounding the cylinder sleeve. P/N 90338-11152-00 About $6 Gary Link to comment Share on other sites More sharing options...
BrileyR Posted March 28, 2011 Author Share #3 Posted March 28, 2011 Thanks for the info. So it's a freeze plug? Should I go ahead and replace them all? Thanks, Briley. Link to comment Share on other sites More sharing options...
Dano Posted March 28, 2011 Share #4 Posted March 28, 2011 Yep, they're 20+ years old. http://www.partshark.com will have the best prices for you. Link to comment Share on other sites More sharing options...
Freebird Posted March 29, 2011 Share #5 Posted March 29, 2011 I don't know how much they are at Partshark but they are 4.74 at boats.net http://www.boats.net/parts/detail/yamaha/Y-90338-11152-00.html Link to comment Share on other sites More sharing options...
twigg Posted March 29, 2011 Share #6 Posted March 29, 2011 I don't know how much they are at Partshark but they are 4.74 at boats.net http://www.boats.net/parts/detail/yamaha/Y-90338-11152-00.html Unusually, boats.net are the cheapest I have found too. Must be their birthday or something. Link to comment Share on other sites More sharing options...
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