Converting jet to prop

Joined
Nov 25, 2024
Messages
2
Hi all,

Motor: Mercury 4 stroke 80hp (2019 model)

Been digging into all the posts here about converting jet to prop. I currently have my lower jet unit out and was going to buy a new lower prop unit. Would be very thankful for all the feedback given here.

Questions:
I measured my shaft length on the lower jet unit and it marks 24.5". I'm assuming I need a 25" shaft for the new lower prop unit.

Where would I connect my shift cables? Previously the shift cables connected to the lower jet unit. I assume I'd need to buy a new set of cables.

Do I need a "bay kit"? Read about this but not sure what I'm looking for.

Thanks!
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
37,907
The 24.5" driveshaft does not automatically mean a 25" shaft lower unit.----Best to get help / price of lower unit at your local dealer.
 

JohnSz

Seaman Apprentice
Joined
Aug 9, 2023
Messages
32
Yes, the cable that operates the "bucket" on the jet will need to be replaced. You will need to look at your motor and compare to a schematic to make sure that you have the rest of the linkage under the cowl.
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,872
You might check the Sterndrive Engineering (SEI) website. Your motor is new enough, I would think, to buy a new gearcase from them.
 
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