1978 70hp 3cyl lower unit help

westy66

Cadet
Joined
Jun 19, 2012
Messages
11
my new 'project' boat doesn't have reverse and my (trusted) mechanic tells me that i need a new lower unit. he says that i could have 6-8 hours into diagnosing and replacing the part, OR i can find a lower unit and swap it over. its a 1978 70hp 700 3cyl Thunderbolt blue band.

ive found a 1643-6458 on eBay for only $269. will that fit? im willing to take a shot.

i am completely striking out at every Merc dealer and mechanic ive called. if the -6458 wont fit, can someone let me know what will fit.

THANKS!!
Bob
 

Snowmann40

Seaman Apprentice
Joined
Aug 13, 2012
Messages
44
Re: 1978 70hp 3cyl lower unit help

You should get your serial number and ask your local dealer if they're compatible.
 
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