I just bought a RT188 and I’m looking to install a spitfire xp7. It has a black max 23p on it now and wondering do I need to drop to a 19p or 21p. I’m unsure of the RPM’s.
I just bought a RT188 and I’m looking to install a spitfire xp7. It has a black max 23p on it now and wondering do I need to drop to a 19p or 21p. I’m unsure of the RPM’s.
Last edited by Fishcommander; 05-21-2018 at 05:39 AM.
20 inch Laser II . Motor in second hole from top.Originally Posted by Fishcommander
I try to drive as if my 16 year old Grandson is following me
Speak as if he is listening and act as if he is watching
I have a 19 pitch x7 on mine and it works out great, never bothered with a 3 blade since this performs so well
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What kind of RPMs do you turn? How heavy of a load? Speed? 2 stroke?
I've got both. The Laser is 2 mph faster, BUT, the X7 is the superior prop.
2015 Ranger RT188 DC; BassCat Storage Box; Mercury Optimax 115ProXS;
19" Spitfire X7; Vessel View Mobile; Minn Kota Ultrex 80; GForce Handle;
TM Eliminator; Helix 7 G2N SI Combo F/R; HydroWave KVD; BBT 4" Angled Bow Mount; Durasafe Locks for Electronics and Ultrex;
Twist Step Boarding Ladder; EZEE Step ES1; BAC RAC Rod Storage; Motor Mate Transom Saver
Have a x18/115 pro xs. Had originally came with 23p alum . Switched to a x7 spitfire 19p last summer. Was more than pleased with performance.
Sound like that is what I’m going to do.
My 16 model 115 pro xs optimax with factory setback plate came with laser2 20p running about 46-48 gps. I recently bought a laser2 22p ran 47-49.7 gps turning 5900 rpm off boat tach. Any tips on a different prop I'd like to see low to mid 50s is that even possible?
Jacos Marine used to have the best price for the X7.
2015 Ranger RT188
2015 115 PRO XS
I have the same setup and have the same performance. My original hull was a 2014 without the trim tabs and would run about 2 mph faster. From day One I wanted to run 50 mph and bought a Laser 22 inch but could only pull it about 5400 rpm with my 2 stroke ProXS. 49.6 was the best I have seen and that was with the 20 inch Laser at 4700 rpm and the motor in the third hole.
In 2015, Ranger replaced my hull which came with the trim tabs and I added the set back plate. I am still running the 20 inch Laser and 46-48 is my new best.
The short answer is I don't think you can get mid 50’s with a 115 HP and I don’t think the boat would be stable at that speed.
I try to drive as if my 16 year old Grandson is following me
Speak as if he is listening and act as if he is watching
Correct, don't even spend the time or money. A JP will give you 1-2mph. I have mine mounted in the third hole and the X7 19" runs great. Haven't been able to test the 20" Laser with all the rain, but will post results. You wanta go fast, XPRESS.The short answer is I don't think you can get mid 50’s with a 115 HP and I don’t think the boat would be stable at that speed
2015 Ranger RT188 DC; BassCat Storage Box; Mercury Optimax 115ProXS;
19" Spitfire X7; Vessel View Mobile; Minn Kota Ultrex 80; GForce Handle;
TM Eliminator; Helix 7 G2N SI Combo F/R; HydroWave KVD; BBT 4" Angled Bow Mount; Durasafe Locks for Electronics and Ultrex;
Twist Step Boarding Ladder; EZEE Step ES1; BAC RAC Rod Storage; Motor Mate Transom Saver
With a bit of cup added maybe.
Wasn't sure if dropping 400 on a spitfire 19p would change anything. I'm fixing to start measuring and play with mounting holes cause I've not moved it from factory height but it does have the 4in set back
16 Ranger rt188 dual console 115 mercury pro xs optimax factory set backplate 20p/22p laser2 props 46-49mph
I was thinking hard about that spitfire at one time, decided against it.
I've actually seen 51 in mine for just a second once. I've ran 50 a few times , when boat was new and not fully loaded. I average 47-48 now. (maybe 49 by myself.)
Last edited by fishinSteve; 02-18-2019 at 09:18 AM.
2014 Ranger RT188
115 Merc 4s, laser II 20p
humminbirds
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