What do these lines do?

[coffeeguy]

485883485884
What do the lines(on both sides of the reed block do?
Are they "pulse" lines?
If they are what is a pulse line?
1980 7 petal horizontal front

[rock]

Most of them are bleed lines to transfer puddled fuel in the reed cages back into the cylinders to get used. The two coming from the intake lube the center mains.

Rock

[FUJIMO]

...thats a darn clean 1980 Merc V-6 ya got there...https://www.screamandfly.com/attachment.php?attachmentid=485883&d=1619133387

[FUJIMO]

https://www.screamandfly.com/attachment.php?attachmentid=485884&d=1619133418

[coffeeguy]

Its only the front half is an 80. Back is an 89 200. This is a Franken-merc at its finest.