Need help with verifying engine year

[Maxlamb85]

Helping a buddy fix his 40 hp merc. Serial number is 6054839 can anybody tell me the year of this engine?

 

[Maxlamb85]

Re: Need help with verifying engine year

New to the site. Read sticky and have my answer thanks

 

[downintime]

Re: Need help with verifying engine year

How many cylinders is the motor?