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Relaxing.
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5,750 Posts
Discussion Starter · #1 ·
anyone know what the mix ratio is on an older Mercury 20hp electric start
serial # 5730301
 

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Original OGF Staff member and owner
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13,422 Posts
My 73 Merc. 10 hp. is 50-1. They have been that way for a long time. PM Lakeraider, he's our resident Merc. expert.
 

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EEEEEK!
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The 7 digit serial numbers started in 1956, which would have been the Mark series. Being your motor is a 50-series serial# I'd say it is a very late 1978 or early 1979. That would make the mix 50:1 :cool: Raider<><>
 

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Relaxing.
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5,750 Posts
Discussion Starter · #5 ·
Thanks raider thats what i figured and i did believe it was a mid 80's just wanted to check with the resident expert on the merc's, she runs real good..
 

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Original OGF Staff member and owner
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Hey Raider. that what I thought also. I have that 73 also have an 85 in canada that uses 50-1. Darn I'm getting better with age.
 
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