solas titan HR on a 2005 187ls

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solas titan HR on a 2005 187ls

Postby Yeah Bouy! » Thu Apr 04, 2013 7:34 pm

So, I'm planning on putting a new prop on my 2005 187 ls; it's got a 14.25" X 17P Stainless steel Apollo prop now and a 4.3 mercruiser that just got a new long block from getting blown up last summer (supposedly the new block is good for 50 hp more than the stock 190). I'm not entirely certain on my top rpm right now because I found out after the motor blew that my tach wasn't registering past 4100 last year. From the way that motor screams at wide open its gotta be running 5000 or close to it. I was considering purchasing a 14.75"X 20P Solas Titan HR 3 blade. Any thoughts? especially on the enlarged diameter...
2005 Caravelle 187
2010 Toyota Tundra Crew Max TRD

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Postby AndrewT » Fri Apr 05, 2013 1:54 am

Don't guess on the engine revs, get the tachometer fixed, WOT (wide open throttle) mus fall within engine specs, just because it sounds like 5000rpm it does not mean it is doing them. I think for the v6 it is 4400-4600 rpm.
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21P 14.5 3B SS prop and 19P 4B SS for wakeboarding and tubing.
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Postby buyfire » Fri Apr 05, 2013 10:12 am

agreed. without an accurate tach reading, you'll just be playing a guessing game. also, i doubt the extra HP you may be getting would allow you to go up 3" in pitch and 1/2" in diameter and still keep you at a good WOT RPM.
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Postby 95LSDIY » Fri Apr 05, 2013 2:28 pm

I would run a 19 pitch. The enlarged diameter will help with some holeshot. My uncle has a 4.3 in his and his tach doesnt work either. He runs a 19 aluminum 3 blade. My old 3.0 4cyl would turn a 15" diameter 17p stainless 4800 rpm's. so I am sure your 4.3 is turning more than 5k with your current prop. do you know what the cause of your engine failure was? maybe your current prop had something to do with it.

the 19 pitch seems to be the common prop for 4.3 boats for an all around performance, now if your looking for just speed then that 20 or a 21 would work good.
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Postby bunker108 » Fri Apr 05, 2013 7:06 pm

What elevation are you running at? I am turning a 21p 3 blade Aluminum 5000 rpms at 4000'. You are probably quite under propped with a 17. I am going to try a 19p SS this year for a better holeshot fully loaded. I think a 4 blade 19 SS would be ideal. But let us know your results. BTW I have a 4.3 Volvo in a 188.
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Postby HOT PURSUIT » Sat Apr 06, 2013 9:01 pm

Need to know WOT RPMs as everyone said, boat weight and lower unit gear ratio then we can help :lol: I am guessing 19P Mercury Revoultion 4, SS, 4 blade would do you very well. But that Sir is a WAG :lol:

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Postby Kimmel » Sun Apr 07, 2013 11:08 am

I have extra aluminum 21 pitch that I'd be willing to sell. New in box, never used. I ordered as a spare and found out I already had a spare that came with boat. PM me if interested.
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