1974 MERC 65hp Lower unit

NathanY

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Mar 16, 2002
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2,408
What other hp lower units will fit this motor? IE, 402,50hp,60hp,80hp? The lower unit was trashed, and now I need another one. Serial number is 4049463. If anyone has one let me know, as long as the gears and all the shafts are good, I dont care if I have to have it resealed.
 

ledgefinder

Ensign
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May 2, 2002
Messages
916
Re: 1974 MERC 65hp Lower unit

50hp (4 cylinder) from 1971 (maybe 1970 also) on up past 1978 (not sure how far past that point) fits. <br /><br />40hp (twin) fits not sure of years, probably similar to 50hp. <br /><br />65-75hp triple fits (obviously) from when they introduced the triple (1973?) on up.<br /><br />The triple runs 1.66/1 gears, most of the 50s and 40s I've seen run 2/1 gears, but not all.<br /><br />The impeller on these is on the lightweight side, as you may know, recommend changing unless you know the one in there is recent.
 

NathanY

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Re: 1974 MERC 65hp Lower unit

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 

tmcalavy

Rear Admiral
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Aug 29, 2001
Messages
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Re: 1974 MERC 65hp Lower unit

Nathan,<br />check ebay. there's at least 3 available right now that will fit your outboard. i share your pain bro, i need to have the lower on my Merc 500 resealed...$62.50 for seals, $70 per hour shop time = OUCH!
 

NathanY

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Mar 16, 2002
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Re: 1974 MERC 65hp Lower unit

I dont have one that needs resealed, I need the whole thing. If anyone has one please let me know.
 

tmcalavy

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Aug 29, 2001
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4,005
Re: 1974 MERC 65hp Lower unit

There are several that will fit on ebay right now....not seals, the whole shebang.
 

jeff412

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Dec 30, 2002
Messages
8
Re: 1974 MERC 65hp Lower unit

I've got a 197? 65 HP Merc. Powerhead and lower unit are good, but the wiring is shot. Where do You live?<br /><br />Jeff
 

jeff412

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Dec 30, 2002
Messages
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Re: 1974 MERC 65hp Lower unit

P.S.<br /> I'm in SE Texas, if that's not too far for you.<br /><br />Jeff
 

NathanY

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Mar 16, 2002
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2,408
Re: 1974 MERC 65hp Lower unit

I live in Springdale Arkansas, I will be in Texas to pick up the motor soon, Please email me.
 
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