eshoberg Posted June 26, 2017 Report Share Posted June 26, 2017 Folks, I have an SCD4 17' prop on the boat now that is about 10 years old and has been reworked once. No major blade damage but not positive the pitch is still dead on at 17. I switched motors about a year ago and swing this prop easily. If i'm not careful with two people I bounce of the rev limiter at 42 mph. I initially got the SCD for stern lift. I've been reading way to much and have narrowed it down to an SCD4 18" or Mercury Spitfire, 4 blade 17". Any thoughts or suggestions before I pull the trigger? Link to comment Share on other sites More sharing options...
geeviam Posted June 27, 2017 Report Share Posted June 27, 2017 Just my opinion... If comparing a stock SCD4 to a stock SpitFire X7... the SpitFire wins. With more cupping and rake, the SpitFire is a 4-blade on steroids. It looks like a 4-blade version of its big brother, the Mercury Tempest Plus. The SpitFire X7 has it all - better grip in turns, great holeshot, faster top speed, and plenty of bow lift if you want to trim it up! Can you tell that I like this prop?!! Also, I should mention that I love my Yamaha Talon SS 3-blade for days when I want to reach the finish-line before others do. Link to comment Share on other sites More sharing options...
eshoberg Posted June 27, 2017 Author Report Share Posted June 27, 2017 My new merc is 2.1 liters. Doesn't have as much hp as the yamaha SHO 115 that one of the forum members is running on a 16 but should have as much if not more torque. Cant decide between a 17 or 19 if I go with a spitfire. I have a 17 scd that gives me a decent holeshot for backwater fishing and would like another prop to get my rpms down a little at cruise. Seems like i'm always running around above 5k. Thinks I can maintain a decent holeshot and spin a 19 on my redfisher 18? If I could run 35 at 4500 that would be ideal. At 4k with my 17 scd i'm running about 26 and at 5k I'm running 3400. The hulls are about 250lbs difference in weight, other than that, I would assume results would be similar. Link to comment Share on other sites More sharing options...
eshoberg Posted June 27, 2017 Author Report Share Posted June 27, 2017 Forgot. Had my SCD 17 rehubbed and reconditioned when I put on my new motor. Suspecting that some cup or pitch was taken out when the blades were worked on. Link to comment Share on other sites More sharing options...
lurem Posted June 27, 2017 Report Share Posted June 27, 2017 eshoberg, Before you pull the trigger on a new prop let's meet up. I'll show you how fast the spitfire prop can be! haha I have a 19 spitfire if you want to try it for fun. It may be the ticket for your rig. I can bring a couple others (props) to if you like. I love me some prop testing!! Link to comment Share on other sites More sharing options...
geeviam Posted June 27, 2017 Report Share Posted June 27, 2017 1 hour ago, lurem said: eshoberg, Before you pull the trigger on a new prop let's meet up. I'll show you how fast the spitfire prop can be! haha I have a 19 spitfire if you want to try it for fun. It may be the ticket for your rig. I can bring a couple others (props) to if you like. I love me some prop testing!! eshoberg, Lurem helping you with your boat's prop setup is like getting a driving lesson from Jeff Gordon! Lurem was a great help to me when I needed some expert advice. My boat performs as good as it gets now. My advice... take him up on his offer! Link to comment Share on other sites More sharing options...
eshoberg Posted June 27, 2017 Author Report Share Posted June 27, 2017 I'll take u up on that lurem! I'm off all next week if you have any time. Link to comment Share on other sites More sharing options...
mulligan Posted June 28, 2017 Report Share Posted June 28, 2017 I will warn you now. Be very carful playing with props with Lurem. Before you know it you will have a room full of shinny props. You have to have your everyday prop, holeshot prop, topend prop, ect. And of course you will need one of each of those for every season plus backups. Link to comment Share on other sites More sharing options...
geeviam Posted June 28, 2017 Report Share Posted June 28, 2017 58 minutes ago, mulligan said: I will warn you now. Be very carful playing with props with Lurem. Before you know it you will have a room full of shinny props. You have to have your everyday prop, holeshot prop, topend prop, ect. And of course you will need one of each of those for every season plus backups. Hahaha, so true! Link to comment Share on other sites More sharing options...
JEM Posted June 28, 2017 Report Share Posted June 28, 2017 Sounds like he is prop rich, and pound foolish!!!! Link to comment Share on other sites More sharing options...
eshoberg Posted June 28, 2017 Author Report Share Posted June 28, 2017 I'm a gearhead and very susceptible to the performance bug. We will see what happens. Hopefully I wont need too many props! Link to comment Share on other sites More sharing options...
dabear Posted June 28, 2017 Report Share Posted June 28, 2017 Uui On June 27, 2017 at 3:46 PM, lurem said: eshoberg, Before you pull the trigger on a new prop let's meet up. I'll show you how fast the spitfire prop can be! haha I have a 19 spitfire if you want to try it for fun. It may be the ticket for your rig. I can bring a couple others (props) to if you like. I love me some prop testing!! Mr. Lurem , I think this guy has a Mercury are you going to be able to install your Yamaha hub props on his motor ? Joe R Link to comment Share on other sites More sharing options...
lurem Posted June 29, 2017 Report Share Posted June 29, 2017 good thinking Joe. I have a couple different flo torque kits for mine so maybe between the two we can make something work. it may be worth a try, nothing ventured nothing gained right? I did run some of my props on a 225 HP merc with the help of his flo torque kits and mine we made it happen. Unfortunately the diameter of mine were way to small. eshoberg, did you get the regular gear case or the command thrust? If you have the command thrust I have a large diameter (13 3/4)18 pitch you may be able to swing. Link to comment Share on other sites More sharing options...
eshoberg Posted June 29, 2017 Author Report Share Posted June 29, 2017 I got the regular gear case so I could use my existing SCD4 17. Now that I'm looking at props I'm wondering if I should have gotten the command thrust case. Too late now. I have what I have. Link to comment Share on other sites More sharing options...
eshoberg Posted July 30, 2017 Author Report Share Posted July 30, 2017 Big thanks to Lurem. Had a great day of fishing and prop testing. Came to the conclusion that my scd4 17 isnt to far off, for my load, and that a little reworking on my existing prop might be my best bet. Saved me a shitload of $ and survived some crappy fishing weather. In addition, forget to tell Lurem that i had 3 group 24 and 2 group 27 batteies on board till almost the end of the day😁 Link to comment Share on other sites More sharing options...
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