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+3 mph
- Thread starter jallen355
- Start date
stlcheckmate
Member
well here is what I got on my boat, its a 20 foot enchanter with a xr4, (2.4 liter, opposed to your 150 xr2 2.0 liter) and I dont have a jack plate or the motor raised at all, I have 1:87 ratio small lower unit, with just 3 holes for water pickup. I ran 54 at 5200 rpm, with a 24 pitch laser 2 prop. I dont know if its the newer style laser or the older style. This week Im installing a CMC 6in back and 5 inch up hydraulic jack plate, and a bobs nose cone and a LWP. According to the guys at compeititon marine, I should gain anywhere from 5-7 mph..with the same prop, with the JP and and nose cone..but Im goin to love the ability to jack the motor up and down whenever I want too. Whether is jacking the motor up while the boat is beached on the shore, while im doing way to much drinking. Or if I drop it all the way down to do some skiing..Im going to have to test some props too..I was thinking a 24 pitch chopper for when I wanna go really fast and going back to the laser too when I wanna take the family out..
jallen355
Well-known member
I still haven't run the 23 Tempest. I didn't really get to spend much time testing this weekend. I did raise my motor up a notch. I'm as far up as I can go. The extension is really mounted too low on the transom and with my motor up all the way, it's still too deep. I'm going to have to move the extension itself up now. Anyway, I did pick up 150 more rpm and 2 mph by raising the motor one more hole and holeshot, handling and water pressure have yet to suffer so I know I can go even more. I just made a quick blast on the way to a frineds house to help him swap out a front door on his house Saturday when I got off work and Sunday was pretty much a wash by the time my chores around the house were done.
Big Dave
Member
NOSECONE
You do not need a nose cone until you are over 80 mph... it will screw up your handling and probably reduce speed not increase it
You do not need a nose cone until you are over 80 mph... it will screw up your handling and probably reduce speed not increase it
jallen355
Well-known member
Got it together yet?? How's it working out for you?
jallen355
Well-known member
64? Wow! That's not a bad number for a 21" LaserII @5800 on an 18' BR. You sure your GPS is accurate...lol! Seems like I figured a 21" prop @ 59.6 mph @6000 with "0%" slip using a pop calculator.
The 21 LaserII was showing 59.5 on my boat @ 5900 rpm on a liqui-meter on my boat. I'm sure the gps number would not have been as generous. Like 55-56 maybe.
The 21 LaserII was showing 59.5 on my boat @ 5900 rpm on a liqui-meter on my boat. I'm sure the gps number would not have been as generous. Like 55-56 maybe.
zstevens
Well-known member
thats possible cuz i had em both worked on i'm not sure what all got done to the laser my 4 blade alm was cupped n could be pitched up to a 21 p laser more close to 22p ? i can get 56 w 4 blade check that w the prop slip im guessin around 6k on tach that was when my rectifier was not lettin the tach work
im not real fond of the laser ll 's ride just not smooth down low
jallen355
Well-known member
I pm'd ya back. Yes, extra cupping will cause a drop in rpm's.
I hope to add some more prop/engine height data to this thread by next week. That's assuming I get my boat back together in time to run it. Actually, I am off Friday and will try to get it at least runable by tonight so I can do some prop testing. I've got the 23" Tempest that I still haven't tried, but I did p/u an offset trim tab to enable me to run it and other props with alot of rake like the Tempest series. Then I have an "unmolested" 21" Stiletto Advantage II which I don't think is going to be enough pitch due to it's 14 1/4" diameter but it will give me some more info to work with. The last Stiletto prop I ran was the Advantage III series, which is really for stern drives, in a 22P/23P. It actually netted the best mph for me, but I could only spin it 5300 rpm and the holeshot was slow. Then, I have a 22P Big Ear Merc Chopper to try. I'm really interested in this one.
Anyway, I have alot of work ahead yet. I repainted my cowl and shirts for my motor. While in the process, I noticed I had a gear oil leak from my prop shaft seal. I pulled the unit and took it to the shop. The mechanic tore it down right there and we found out that somewhere in the past, someone had turned the prop shaft down in the area that the prop shaft seals ride and had machined a repair sleeve for that area. Well, the sleeve split and was walking out the back. Although there was no water inside, there was some pitting on a couple of the bearings so I had the replaced along with all the seals and they even installed a new Merc water pump setup. The other pump was new, but it was a Sierra and the tech didn't care for the brand as he has had problems with them in the past.
Now, I've reinstalled the lower unit, but have removed the motor and have it swinging from the rafters in my garage. I need to move my extension bracket higher on my transom to gain anymore upward adjustment for engine height. I was maxed out @4 1/4" below. I also had to remove the gas tank to gain access to the lower pair of mounting bolts. Then I decided to disassemble the transom bracket and wet sand and polish it. It's looking great at the moment. Then I decided that the factory transom reinforcement plate was looking a little dingy in comparison so I taped it off, sanded, primed and painted it. I would like to relocate the battery to the port side while I have the tank out, but that will mandate somewhat of a rerig of all my wiring/hoses/cables etc. and I don't have all the reigging hose an fittings I need at the moment so I may just put it back together for now so I can test tomorrow. Right now I'm out of time and money...lol!
I hope to add some more prop/engine height data to this thread by next week. That's assuming I get my boat back together in time to run it. Actually, I am off Friday and will try to get it at least runable by tonight so I can do some prop testing. I've got the 23" Tempest that I still haven't tried, but I did p/u an offset trim tab to enable me to run it and other props with alot of rake like the Tempest series. Then I have an "unmolested" 21" Stiletto Advantage II which I don't think is going to be enough pitch due to it's 14 1/4" diameter but it will give me some more info to work with. The last Stiletto prop I ran was the Advantage III series, which is really for stern drives, in a 22P/23P. It actually netted the best mph for me, but I could only spin it 5300 rpm and the holeshot was slow. Then, I have a 22P Big Ear Merc Chopper to try. I'm really interested in this one.
Anyway, I have alot of work ahead yet. I repainted my cowl and shirts for my motor. While in the process, I noticed I had a gear oil leak from my prop shaft seal. I pulled the unit and took it to the shop. The mechanic tore it down right there and we found out that somewhere in the past, someone had turned the prop shaft down in the area that the prop shaft seals ride and had machined a repair sleeve for that area. Well, the sleeve split and was walking out the back. Although there was no water inside, there was some pitting on a couple of the bearings so I had the replaced along with all the seals and they even installed a new Merc water pump setup. The other pump was new, but it was a Sierra and the tech didn't care for the brand as he has had problems with them in the past.
Now, I've reinstalled the lower unit, but have removed the motor and have it swinging from the rafters in my garage. I need to move my extension bracket higher on my transom to gain anymore upward adjustment for engine height. I was maxed out @4 1/4" below. I also had to remove the gas tank to gain access to the lower pair of mounting bolts. Then I decided to disassemble the transom bracket and wet sand and polish it. It's looking great at the moment. Then I decided that the factory transom reinforcement plate was looking a little dingy in comparison so I taped it off, sanded, primed and painted it. I would like to relocate the battery to the port side while I have the tank out, but that will mandate somewhat of a rerig of all my wiring/hoses/cables etc. and I don't have all the reigging hose an fittings I need at the moment so I may just put it back together for now so I can test tomorrow. Right now I'm out of time and money...lol!
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boatman4021
Well-known member
If you can turn a 23" Tempest + then you can probably turn a 25" Trophy+ or a TurningPoint 25" 4 blade. boatman
jallen355
Well-known member
There ain't a whole lot of winter down here, Dave. Thankfully!!! We've still got plenty of time to work/play/test!!
Boatman, I can, in fact turn the 23" Tempst. Read on....
OKay, so here it is. I decided to quit messing around with a lifting ring and an engine hoist. I broke down and replaced my "freshly wet sanded and polished" 10" aluminum hard-tail transom bracket with a 9.5" manual jack plate from Lance Mfg. I beat up the local dealer for a "better than internet" price on an in stock unit Friday. So, armed with a new Jack Plate, 3 props to test with, a fresh lower unit and freshly painted peanut motor hanging from my garage rafters, I got to wokr Friday evening when I got home. By midnite I was all rigged and ready for testing.
Previuosly my engine was adjusted up to 4" below the pad. A height better suited for a trawl boat... I would have had to, and was in the process of raising my transom bracket up when I took a 180 degree turn and bolted up a manual jackplate with 9.5" of setback. With it, I set the lower limit to place the prop shaft centerline @ 3.5" below the pad thinking I might still want some depth for a "ski setup". With a 4" vertical adjustment, I am able to raise the motor up to 1/2" above the pad. Now, I do not have a low water p/u. I do have the top three water intake holes on my big case epoxied over. I also have the Mercury water intake scoops, but have yet to install them. I started the day @3" below the pad and kept an eye on my water psi. The new Mercury water pump upped my psi @WOT to16 psi. That's a net gain of 2 psi over the previously installed Sierra piece that was also new. I worked up to a height of 1" below the pad before I saw the psi begin to waver....OCASSIONALY don to 12-13 psi so I stopped there. Now it's time to add the scoops and see how they acually work.
So, here's the numbers on the props I tested today. I only ran two of the three I had to test. I opted not to bother with the Stiletto Advantage II 21" after starting with and seeing the results with the bigger blades. I figured I was just be spinning it to the moon and not getting anywhere very fast.
I know, I know. This is getting long winded. But hopefully all this will help some poor soul out one day.
First prop tested:
Merc 22P Big Ear Chopper @ 1" below the pad w/16 psi @WOT.
62-63 mph @6150 RPM and a decent holeshot and pretty decent handling, as well.
Then I swapped the Chopper for the "Club" as my buddy calls it.
Quicksliver Tempest 23" @ 1" below the pad wi/16 psi @WOT.
64-65 mph @5850-5900 RPM and a slower holeshot than the Chopper, but acceptable.
Wow!!!! I am impressed. The additional engine height provided by the Jackplate and allowed me to step up in pitch and being able to turn the 23" Tempest to 65 mph has gained my 5-6 mph over anything I have done to date. I am excited. This prop was also very stable at speed. I contribute some of the better handling today to my recent upgrade to dual cable NFB steering upgrade, as well, though. I'm sure the additional engine height further enhanced the high speed stability, too. All in all my boat is really doing well right now. I've still got a few more tweaks left up my sleeve and an offer to try out a 24" Merc Chopper from the same guy that loaned me his 22" chopper for today's testing. That should proove very interesting, indeed.
Not bad for an 18" sled with a little 2.0 liter 150 w/a fresh overhaul and Boysen reeds but otherwise stock in every way.........
Boatman, I can, in fact turn the 23" Tempst. Read on....
OKay, so here it is. I decided to quit messing around with a lifting ring and an engine hoist. I broke down and replaced my "freshly wet sanded and polished" 10" aluminum hard-tail transom bracket with a 9.5" manual jack plate from Lance Mfg. I beat up the local dealer for a "better than internet" price on an in stock unit Friday. So, armed with a new Jack Plate, 3 props to test with, a fresh lower unit and freshly painted peanut motor hanging from my garage rafters, I got to wokr Friday evening when I got home. By midnite I was all rigged and ready for testing.
Previuosly my engine was adjusted up to 4" below the pad. A height better suited for a trawl boat... I would have had to, and was in the process of raising my transom bracket up when I took a 180 degree turn and bolted up a manual jackplate with 9.5" of setback. With it, I set the lower limit to place the prop shaft centerline @ 3.5" below the pad thinking I might still want some depth for a "ski setup". With a 4" vertical adjustment, I am able to raise the motor up to 1/2" above the pad. Now, I do not have a low water p/u. I do have the top three water intake holes on my big case epoxied over. I also have the Mercury water intake scoops, but have yet to install them. I started the day @3" below the pad and kept an eye on my water psi. The new Mercury water pump upped my psi @WOT to16 psi. That's a net gain of 2 psi over the previously installed Sierra piece that was also new. I worked up to a height of 1" below the pad before I saw the psi begin to waver....OCASSIONALY don to 12-13 psi so I stopped there. Now it's time to add the scoops and see how they acually work.
So, here's the numbers on the props I tested today. I only ran two of the three I had to test. I opted not to bother with the Stiletto Advantage II 21" after starting with and seeing the results with the bigger blades. I figured I was just be spinning it to the moon and not getting anywhere very fast.
I know, I know. This is getting long winded. But hopefully all this will help some poor soul out one day.
First prop tested:
Merc 22P Big Ear Chopper @ 1" below the pad w/16 psi @WOT.
62-63 mph @6150 RPM and a decent holeshot and pretty decent handling, as well.
Then I swapped the Chopper for the "Club" as my buddy calls it.
Quicksliver Tempest 23" @ 1" below the pad wi/16 psi @WOT.
64-65 mph @5850-5900 RPM and a slower holeshot than the Chopper, but acceptable.
Wow!!!! I am impressed. The additional engine height provided by the Jackplate and allowed me to step up in pitch and being able to turn the 23" Tempest to 65 mph has gained my 5-6 mph over anything I have done to date. I am excited. This prop was also very stable at speed. I contribute some of the better handling today to my recent upgrade to dual cable NFB steering upgrade, as well, though. I'm sure the additional engine height further enhanced the high speed stability, too. All in all my boat is really doing well right now. I've still got a few more tweaks left up my sleeve and an offer to try out a 24" Merc Chopper from the same guy that loaned me his 22" chopper for today's testing. That should proove very interesting, indeed.
Not bad for an 18" sled with a little 2.0 liter 150 w/a fresh overhaul and Boysen reeds but otherwise stock in every way.........
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