What kind of prop should I use on a deep v with 200hp Suzuki?

[vroom ZOOM]

Hello

Finally got the engine back on the boat but since the engine fell on the prop, I went to the repair shop and they gave me a sky high price. The dude at the repair shop honestly said that it is time to find another prop. So I went to the merc prop finder and it didn't give me any results, so I increased the weight of passengers and cargo to 1000 lbs (realistically I weigh like 140lbs plus maybe a full bait tank of fish) and it told me to use the 27 pitch fury or tempest plus. BUT these are only merc props. I was thinking about an omc raker. The busted prop is a 16x21 suzuki stainless prop. I think all the trouble with this prop selection is that my engine gear ratio is 2.29, and on a boat that weighs 1600lbs that is too much, so it needs a monster of a prop. But like I said I saw some really nice rakers 26p ones up for sale, was wondering if those might work? Also a boatload of mirage 27p props up for sale. My goal with this boat is top speed. It is a tuffy 1890 esox deep v. Not quite a bass boat because the sides are higher, but the bottom is the same and it has a bass boat "pad". Any reccomendations on what props to put on it? Thanks

 

[Sea Rider]

What's the max wot revs the motor achieved as loaded prior the current installed prop went kaput ? That's to know if were a good performer to go for same new one or one with less pitch if in need to pull wot revs up for motor to run at middle-wax wot rpm range factory stated for said motor.

Happy Boating

 

[Faztbullet]

If it ran correctly with old pitch just replace with a exact copy... Going down in diameter will allow you to go up a pitch or two. A 24 P @ 6000 is mid 50's MPH which is about right for that hull..
https://www.generalpropeller.com/lfs3-r21-pcls200

 

[vroom ZOOM]

I just talked to the PO about the prop, he said that the previous prop worked pretty good but that is the only one he had. He rarely pushed the engine to the max so he wasn't really sure on the WOT rpm. He said he did 50mph with the 16x21 three blade, which seems pretty darn good for that prop. Seems like it was more of a load lifter prop than a speed prop, with the big diameter and smaller pitch. So let's say I go down to a 14.5, how much would I have to go up in pitch? I am looking to maximize speed on this rig. I don't want to put the same prop on for two reasons: First, I am looking for a good used prop, a new one would break the bank, I would rather get a high end used prop rather than a new el crapola prop, and this particular size is pretty uncommon. Second is that I want to go up in pitch and down in diameter. Like i said the old prop in my opinion seems like a good option for a heavy boat, but mine is relatively light, and the lower pitch on it might not be able to keep up with the faster moving water. So going up in pitch to retain the grab on the water at high speed and going down in diameter to keep rpm's the same seems logical. Merc's prop finder thing says a 27 pitch or more, Faztbullet a 24 pitch might be the ticket, I am thinking somewhere between 24 and 27 with a 14.5 diameter should do the trick. now what model of prop should I use? This I have no way of knowing, and you guys probably have some opinions on this. What I mean is do I need a raker, tempest, fury, mirage, etc? which of these props would be the best for my boat?

 

[Sea Rider]

All motors must run around their max wot rpm range factory stated to reach the HP rated on their respective cowls, once there can throttle at the throttle range you like most or feel confy with. If the kaput prop is still installed go for a wot spin on calm flat water as loaded and throttle the motor to max hammer, report the max wot reading to know if current prop performed good, excellent to buy same new or other prop with less pitch.

Happy Boating

 

[vroom ZOOM]

the old prop is too wrecked to be usable. One of the blades is bent right back! The only data I have is from the PO, will try to ask him what the WOT rpm is.

 

[dingbat]

All motors must run around their max wot rpm range factory stated to reach the HP rated on their respective cowls,
Happy Boating

Which brings up a question......do you prop for max. HP or max. RPM?

Peak HP and max. RPM rarely, if ever coincide.

 

[Sea Rider]

Which brings up a question......do you prop for max. HP or max. RPM?

Peak HP and max. RPM rarely, if ever coincide.

Well Sir, that info is posted in the Tohatsu web page, unless being one kind of a motor? Anyway it's better to prop a motor right to run towards it's max wot rpm range for an outstanding hole shot as usually loaded, if with a fixed load much better which works top for me.

Happy Boating

 

[Faztbullet]

which brings up a question......do you prop for max. Hp or max. Rpm?

rpm.....

 

[vroom ZOOM]

Ok so I went ahead and got a 14.5x27 tempest plus. The merc prop finder told me to use the biggest friggin prop (it came up with nothing till I raised the weight of passengers a lot, then told me to use a 27p tempest) so there was a really nice used one near me so I bought it. If it doesn't work I can sell it the same way lol. Now I need a hub. The prop has a big semi square hole in it. Now I can get a flo torq II hub that will work with my engine, but I heard they aren't the best. Then there is also the solas RBX-104 hub, also a turning point one and a bunch of other brands. Which one of these works the best? And most important, will they all fit? Are they a standard size? Another thing is the PVS plugs. How do they work, and how do I adjust them?

 

[dingbat]

Hub wise, I had a lot of chatter with the Flo-torque style (hard) plastic hubs. Solved the problem by going with a Rubex RBX series rubber hub.

PVS plugs.....https://m.youtube.com/watch?v=UvYz9iyfyYE

 

[Faztbullet]

It will never turn a 27 pitch...

 

[vroom ZOOM]

Hub wise, I had a lot of chatter with the Flo-torque style (hard) plastic hubs. Solved the problem by going with a Rubex RBX series rubber hub.

PVS plugs.....https://m.youtube.com/watch?v=UvYz9iyfyYE

ok, thank you, that was the info I was after!

 

[vroom ZOOM]

It will never turn a 27 pitch...

uhh... we will see about that. If not, no big deal, I can sell the prop and get another one. I went with this size b/c merc prop finder said so. The reason it needs such a big prop is that suzi's are really geared down, this one is 2.29, whereas a regular optimax is 1.75, so uhh yeah the big prop makes sense. But there is no way to know if it works without trying it out.

 

[QBhoy]

If it helps you any. I have a 19ft cuddy deep v narrow hull. I’ve one of the new merc 115 ct 2.1l mercs. But they are actually about 130-140hp tested. Has a 2.38 ratio. So similar. I turn a 20” enertia to about 6100 rpm give or take at about 44/45 mph gps. Turns a tempest plus 19” to the limiter at about 6250/6200 at 43 gps. I think you’d do well to turn a 27” tempest well. Despite your extra 60/70hp when she was new. Never know though. Wouldn’t be the first time a tempest has surprised with its results.

 

[vroom ZOOM]

idk, we will find out, the only way is to test. My boat has a bass boat style planing pad, probably your cuddy is a tad heavier. Yeah maybe it IS a little too much, but since I have the prop it's worth a shot. usually people run the SS gearcase version of this engine, with a gear ratio of 1.8 or something like that and they run 25p props. My rev limiter BTW is at 6000. I think this boat will need a larger diameter prop, and lower pitch due to the reduction. A 2.38 for a pro xs seems like a lot to me, all the performance motors I have heard of have a ratio of less than 2 but idk maybe its the older ones and I am outdated lol. anyways my relatively big reduction apparently makes finding the right prop a lot more difficult. also will need to test if I need to raise my motor, it's currently 2nd hole from the lowest position (motor fully down).

 

[vroom ZOOM]

ok, so I FINALLY got it out on the water (shoulda started a resto thread on this boat lol). I hit it and it got outta the hole really quick! like maybe 1.5 seconds to full plane! I ran up to WOT (trim down) and it hit 5200. I couldn't trim up because I was testing this boat on a twisty turny river and by the time I trim up it is time for another sharp turn. If I turn trimmed up it will blow out. I MIGHT need to go down to a 26, but the 27 was pretty close, and if it was terribly overpropped it would not get out of the hole so fast. Will check on a wider body of water and trim up next time. Boat got pretty FAST, not a lot of time before it gets to the next bend in the river! Moral of the story is that the merc prop finder WORKS!!! And it is pretty accurate!