Which is the best book to look at?

[Barryyamaha]

Hi:<br />My boat motor is a Yamaha 4 hp<br />Model 4MSHS<br />Serial number 6GEO S 146428<br />Year 1994<br /><br />I have seen in this website some options. But, in your best opinion which one would you recommend me for this boat motor if I am interested not only in knowing more about the motor parts but also in repairing ?<br /><br />Thanks a lot!<br /><br />Barry