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  #1  
Old 07-14-2016, 07:50 PM
dannobark dannobark is offline
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Default 1775 Lund Impact Prop Question

Hi all. I am running a 1775 Lund impact with a 2016 115 Mercury 4S. Just upgraded to a stainless spitfire x7. WOT I am getting about 40-42 but only 5200 RMP. The prop is a 19p, which is what my boat dealer said Lund recommended. Are my RPM's too low? Should I look into getting it repitched to an 18? Thanks for any input.
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  #2  
Old 09-23-2016, 04:53 PM
Lazy Fisherman Lazy Fisherman is offline
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You might get more responses if you repost your question on the Motors and Props message board.
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Old 09-24-2016, 05:51 AM
rickn rickn is offline
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That's the same set up I have, but I put a 17 inch x7 on, rpm is 58-5900, speed 42.
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Old 10-06-2016, 04:52 AM
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Bobby Winds Bobby Winds is online now
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I would say to "insure" you get the most out of your outboard, try a 17p prop.
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Old 10-12-2016, 09:46 AM
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T Mac T Mac is offline
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Quote:
Originally Posted by dannobark View Post
Hi all. I am running a 1775 Lund impact with a 2016 115 Mercury 4S. Just upgraded to a stainless spitfire x7. WOT I am getting about 40-42 but only 5200 RMP. The prop is a 19p, which is what my boat dealer said Lund recommended. Are my RPM's too low? Should I look into getting it repitched to an 18? Thanks for any input.
We do recommend a 17p when using one of the new x7 SS Spitfires on a 1775 Impact.
We tested in early June. We did better with the 17p- SS x7
-Also...I think your tachometer may not be reading correctly (Set on wrong poles?) because your speed is pretty decent.
It doesn't compute.

Last edited by T Mac; 10-12-2016 at 09:51 AM.
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Old 10-12-2016, 11:22 AM
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Bobby Winds Bobby Winds is online now
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Quote:
Originally Posted by T Mac View Post
We do recommend a 17p when using one of the new x7 SS Spitfires on a 1775 Impact.
We tested in early June. We did better with the 17p- SS x7
-Also...I think your tachometer may not be reading correctly (Set on wrong poles?) because your speed is pretty decent.
It doesn't compute.
I agree that the boat tach could be off...........mine shows about 1000-1200 rpm's higher then my HDS7 that's hooked up to my outboard via NMEA 2000 and a engine interface cable. Yet dead nuts on at ideal...........boat tach's are cheapo crapo stuff....
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2015 Polar Kraft Frontier 179WT
2015 E-TEC 90 HO
2015 Trailmaster trailer
Lowrance HDS7 Gen 2 Touch unit networked to a LMS 520c
Lowrance Engine Interface cable
Minn Kota Power Drive V2 US2 now with i-Pilot
Custom designed and built rod holders
Custom designed and built down rigger platforms
All towed with my Trusty G2 '07 Toyota Tundra
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