15hp mariner year?/odd noise after new impeller

bramble

Recruit
Joined
Jun 25, 2014
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1
Hi could anybody let me know the year of my engine please. Engine plate reads 15ML 684C-L-345747.Made in Japan
Also just fitted a new impeller on start up at low to medium revs odd vibrating/ rubbing noise goes at high revs or when put in drive, I found two small 1/2 round peices of corroded pipe in the bottom of the lower unit???? seems to be blowing a lot of exhaust from around the prop????
Thanks in advance Eric
 
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