The Ford Barn

alanwoodieman · 05-04-2020, 07:11 PM

need to know the valve lash settings on this rnhine

51 MERC-CT · 05-05-2020, 07:31 AM

This from factory manual for '49-'51 8CM Mercury.

alanwoodieman · 05-05-2020, 07:32 AM

thanks' 51 merc

rotorwrench · 05-05-2020, 08:28 AM

The difference on the late 1951 engines is the rotator type valves that came some time in early 1951. They are same as Ford for the most part. The C8CM indicates Canadian Mercury but that won't make any difference since they were the same basic engines between Dearborn and Windsor.

alanwoodieman · 05-05-2020, 11:30 AM

I have done mostly A and 59 ab engines. how do you tell the different years. by the valve keeper. there is nothing on the surface under the intake except for some random z's, other marks

51 MERC-CT · 05-05-2020, 01:54 PM

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The engines are basically the same but the valve train in '51 has a rotator keeper assy. that also uses a shorter spring.

alanwoodieman · 05-05-2020, 09:30 PM

my valve keepers are like the pictured 51 in your picture-in the back of my mind I knew of this but was timid to make the decision--THANKS again merc 51

05-04-2020, 07:11 PM	#1
alanwoodieman Senior Member Join Date: May 2010 Location: upstate SC Posts: 2,963	C8CM engine need to know the valve lash settings on this rnhine

05-05-2020, 07:32 AM	#3
alanwoodieman Senior Member Join Date: May 2010 Location: upstate SC Posts: 2,963	Re: C8CM engine thanks' 51 merc

05-05-2020, 08:28 AM	#4
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,422	Re: C8CM engine The difference on the late 1951 engines is the rotator type valves that came some time in early 1951. They are same as Ford for the most part. The C8CM indicates Canadian Mercury but that won't make any difference since they were the same basic engines between Dearborn and Windsor.

05-05-2020, 11:30 AM	#5
alanwoodieman Senior Member Join Date: May 2010 Location: upstate SC Posts: 2,963	Re: C8CM engine I have done mostly A and 59 ab engines. how do you tell the different years. by the valve keeper. there is nothing on the surface under the intake except for some random z's, other marks

05-05-2020, 01:54 PM	#6
51 MERC-CT Senior Member Join Date: May 2010 Location: East Hartford, Ct Posts: 5,898	Re: C8CM engine Sponsored Links (Register now to hide all advertisements) The engines are basically the same but the valve train in '51 has a rotator keeper assy. that also uses a shorter spring. __________________ DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES

05-05-2020, 09:30 PM	#7
alanwoodieman Senior Member Join Date: May 2010 Location: upstate SC Posts: 2,963	Re: C8CM engine my valve keepers are like the pictured 51 in your picture-in the back of my mind I knew of this but was timid to make the decision--THANKS again merc 51