prop size for 140 zuki

[shawn1127]

guys i need your help agin iam picking my new eng up this week i talked to a guy in pompano last week says thay have installed a few 140s on 20'sf and swung 20 or 21 pitch prop
i have looked thru past threads and have not found a
discussions on this motor and prop config i no some of you
are running this eng any help i would be greatfull
thanks

[shawn1127]

went w/21 pitch i will see how it works

[muddywater]

While we are asking about Zuki's, what sayeth the prop gurus on the pitch of a Rev 4 on a Zuke 175 for a SF20?

Merc Prop Selector says 14.625" x 23"

[shawn1127]

14 x21 ran fine but max rpm was 5700 got a 14x19 should do the deal time will tell 29@4000 is nice though

[Jon G]

My 20' came with a 20 Suzi prop and it only topped out at 5700rpm (bottom of the WOT rpm range), I switched to an 18 and now it revs to the max 6200rpm at wot and is much more responsive with a beter whole shot and better fuel economy the 20" pitch was borderline for my boat boat the 18" is perfect. Fully loaded heavy boat will just make 6200.