83 MERCURY 150...What exactly do I have here?

[drm11900]

Sorry guys this may be a dumb question, but what exactly do I have here.

Serial #6221419

Is this a plain old 150 H.P. or a XR-2 MARATHON MAGNUM (V-6)?
Mercury parts express shows a combined book like this
(150 H.P. XR-2 MARATHON MAGNUM (V-6) (1978-1985 COMBINED BOOK)

I'm looking to buy a prop and the XR-2 WOT RPM = 6000 while the 150 h.p. = 5500

 

[Faztbullet]

Re: 83 MERCURY 150...What exactly do I have here?

Plain jane 150

 

[drm11900]

Re: 83 MERCURY 150...What exactly do I have here?

Much Appreciated.