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Author Topic:   170 Montauk 90-HP Veradito: 44-MPH

WT posted 03-13-2007 05:36 PM ET (US)
Best speed downstream 45.5-MPH, best time upstream 42.6-MPH. So I averaged 44.05-MPH.
Data:
1. River current was approximately 1.8 mph.
2. My weight 185 pounds.
3. 18 gallons of fuel.
4. Batteries and charger 200 pounds.
5. Kicker motor on transom.
6. WOT was 6,000-RPM downstream.
7. WOT was 5,800 to 5,900-RPM upstream.
I had just bought a used Laser II 20-inch pitch prop which I took to a Prop Scan shop. True pitch is 19.5-inch and my three blades where not uniform in length. The Prop Scan tech said I was going to get some vibration with this prop and he was absolutely correct. He said the prop was off balance a bit but within tolerances. I felt vibration at 3,000-RPM. I also have large vents which are opened on the prop.
My old Vengeance prop according to Prop Scan was a lot better proportioned and balanced prop. Its pitch was supposed to be 18-inch but was actually 17.5-inch.
I'm going to have Prop Scan balance and "blueprint" my used Laser II tomorrow.
Let's see if I can average 45 mph after the prop is dialed in!!
Warren
Perry posted 03-13-2007 10:45 PM ET (US)
That is good performance Warren. What was the top speed with your old 90 HP Mercury four-stroke and how does the hole shot compare?
Boston Whaler's performance data says that the same motor and prop pushes the new 170 Montauk to 46.6-MPH. I thought that figure was a little high for a 90-HP motor.
WT posted 03-13-2007 11:04 PM ET (US)
My old 2004 Mercury and Yamaha carburetor 90 got me to 39 to 40-MPH.
This new Laser II 20-inch pitch prop shoots me onto plane pretty fast as compared to my old 18-inch Vengeance. Comparing getting on plane between both motors, the new Veradito is much faster.
So far the new Veradito is faster, quicker and less thirsty. :- )
Warren
Teak Oil posted 03-14-2007 06:23 PM ET (US)
Good info thanks. If the Laser II was put on the old 90 probably 42 would have been the max so it sounds like the new 90 definitely has more oomph than the Mercaha.
44 in a 170 is good performance with 90 horses.
WT posted 03-14-2007 08:42 PM ET (US)
My old 90 Mercaha couldn't spin a Laser II 20 pitch prop at 6000 rpm. It could only spin my old 18 pitch Vengeance to 6000 rpm.
I can't complain about doing 44 mph on my 170 Montauk. :- )
Warren
contender posted 03-14-2007 08:51 PM ET (US)
Question, What are you guys using to measure your speed, GPS or a radar gun? thanks
WT posted 03-14-2007 08:56 PM ET (US)
GPS.
Warren
WT posted 03-14-2007 09:01 PM ET (US)
Boston Whaler's website has performance figures for the 2007 170 Montauk. It states that top speed is 46.6 mph.
My unscientific results may help to confirm Boston Whaler's results.
Warren
sosmerc posted 03-15-2007 10:27 AM ET (US)
WT...I'll bet Whaler didn't test with a Laser II :)
The info you are providing is great! And I think it will be especially helpful if you give us some test results AFTER you have your prop repaired by these Propscan folks.
I for one am very interested to see if going to the extra expense provides a noticeable improvement. I have certainly read good things about Propscan services, but I don't think there are many small boat operators that take advantage of the process due to the cost.
By the way, what hole is your engine currently mounted in?
(with a Laser II you could probably raise the engine as high as it can go and it would still work well)
Thanks again for your "reports".
WT posted 03-15-2007 10:51 AM ET (US)
sosmerc:
Boston Whaler did indeed us a 20 pitch Laser II. I believe that all new 170 Montauks purchased with the 90 Veradito come with the 20 pitch Laser II.
http://www.whaler.com/Rec/pdfs/170MontaukEng.pdf
I bought my used prop on Ebay for $165 with a hub kit. A new prop was quoted at $300-450 without a hub kit. The seller said the prop had 5 hours on it. The reason for him selling the prop was because he wanted a stern lifter not a bow lifter. The real reason was probably because the prop is slightly out of balance.
Here's some information about Prop Scan. They will check your prop for free.
http://www.props.com.au/
I figure that a prop is one of the most important pieces of equipment for boating performance, so I may as well make sure that it is tuned for my boat.
Warren
WT posted 03-15-2007 11:33 AM ET (US)
My outboard is mounted on the second hole meaning I could move it up 3 more holes.
sosmerc posted 03-15-2007 06:15 PM ET (US)
I stand corrected...I see they did use a Laser II. That really surprises me, as many of the tests I've seen Whaler conduct they seem to prefer to use a less expensive prop such as the Vengeance....but never the less, I'm glad to see they used it. I wonder if they ever really played much with engine height. If the gearcase performs as well as the L4 2 stroke version I know for a fact that the prop will work with the engine all the way up. I once rigged a 17 Super Sport with a 1988 100hp L4 and we put the motor as high up as it would go and tried the Laser II. It worked very well, and the high engine height eliminated a spray issue with that gearcase. He pulled skiers no problem, and ran pretty fast at top end. We put dual cable steering on it to tighten things up to reduce chine walk.
Merc makes a much less expensive version of the Laser II called the Lightspeed. It doesn't have as nice a finish and the last one I ran didn't have the PVS system, but it performed just like the Laser II.
imko posted 03-16-2007 09:28 AM ET (US)
Warren,
I have also a Montauk 170 with a 90 4-stroke (2003)
I use a Laser II 13,25 x 20" mounted third hole (middle)
Top speed 44,1 at 5800-5900 rpm.

Best regards,
Imko
WT posted 03-16-2007 11:28 AM ET (US)
Imko:
Wow!
Did you notice a HUGE difference between the stock 18 pitch Vengeance and the 20 pitch Laser II?
Did you raise you outboard 1 hole or did it come mounted in the middle hole? I think I'm going to have my motor raised to the middle hole the next time I bring my boat in for service.
Are your vents opened on your Laser II? If they are opened perhaps you could use some medium plugs to gain 200 rpm at WOT.
Are you sure your Laser II is 13.25 inches in diameter and not 13.5 inches?
I just picked up my Prop Scanned Laser II. I may not get much improvement in speed at WOT. In order to match the size of all 3 blades on my prop, my overall pitch was reduced by .43 inches. My pitch is now 19.118, it was 19.548 inches. I suppose the smaller pitch was recommended because I sometimes carry 1 or 2 additional fishermen on board. I could also close my vents.
Warren
WT posted 03-16-2007 11:42 AM ET (US)
My old 2004 Mercaha 90 would hit 42 mph prior to me loading up the 170 Montauk with additional weight. After I added the kicker, Turbo Lift, additional batteries, etc., my WOT speed decreased to about 39 mph.
Warren
imko posted 03-16-2007 05:29 PM ET (US)
Warren,
There is a big difference between this 2 props! I use the std. small vent plugs. Top speed is with 1 person on board, and 1 tank fuel. With the Vengeance 18"prop i hit the rev. limiter (6200-6300 rpm) Mid range is a lot better
with the Laser II. (hole shot not!)
I rased also my console 4 inch , and made a modification
for the bow rail.
http://i75.photobucket.com/albums/i285/ihoekstra/DSCF0536.jpg
Good look with youre new Veradito!!
Here it is rated for 100 hp now :
http://www.boatservicedannijs.nl/nieuw_motoren_specs.php?id=149
Regards,
Imko

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Author	Topic: 170 Montauk 90-HP Veradito: 44-MPH
WT	posted 03-13-2007 05:36 PM ET (US) Best speed downstream 45.5-MPH, best time upstream 42.6-MPH. So I averaged 44.05-MPH. Data: 1. River current was approximately 1.8 mph. 2. My weight 185 pounds. 3. 18 gallons of fuel. 4. Batteries and charger 200 pounds. 5. Kicker motor on transom. 6. WOT was 6,000-RPM downstream. 7. WOT was 5,800 to 5,900-RPM upstream. I had just bought a used Laser II 20-inch pitch prop which I took to a Prop Scan shop. True pitch is 19.5-inch and my three blades where not uniform in length. The Prop Scan tech said I was going to get some vibration with this prop and he was absolutely correct. He said the prop was off balance a bit but within tolerances. I felt vibration at 3,000-RPM. I also have large vents which are opened on the prop. My old Vengeance prop according to Prop Scan was a lot better proportioned and balanced prop. Its pitch was supposed to be 18-inch but was actually 17.5-inch. I'm going to have Prop Scan balance and "blueprint" my used Laser II tomorrow. Let's see if I can average 45 mph after the prop is dialed in!! Warren
Perry	posted 03-13-2007 10:45 PM ET (US) That is good performance Warren. What was the top speed with your old 90 HP Mercury four-stroke and how does the hole shot compare? Boston Whaler's performance data says that the same motor and prop pushes the new 170 Montauk to 46.6-MPH. I thought that figure was a little high for a 90-HP motor.
WT	posted 03-13-2007 11:04 PM ET (US) My old 2004 Mercury and Yamaha carburetor 90 got me to 39 to 40-MPH. This new Laser II 20-inch pitch prop shoots me onto plane pretty fast as compared to my old 18-inch Vengeance. Comparing getting on plane between both motors, the new Veradito is much faster. So far the new Veradito is faster, quicker and less thirsty. :- ) Warren
Teak Oil	posted 03-14-2007 06:23 PM ET (US) Good info thanks. If the Laser II was put on the old 90 probably 42 would have been the max so it sounds like the new 90 definitely has more oomph than the Mercaha. 44 in a 170 is good performance with 90 horses.
WT	posted 03-14-2007 08:42 PM ET (US) My old 90 Mercaha couldn't spin a Laser II 20 pitch prop at 6000 rpm. It could only spin my old 18 pitch Vengeance to 6000 rpm. I can't complain about doing 44 mph on my 170 Montauk. :- ) Warren
contender	posted 03-14-2007 08:51 PM ET (US) Question, What are you guys using to measure your speed, GPS or a radar gun? thanks
WT	posted 03-14-2007 08:56 PM ET (US) GPS. Warren
WT	posted 03-14-2007 09:01 PM ET (US) Boston Whaler's website has performance figures for the 2007 170 Montauk. It states that top speed is 46.6 mph. My unscientific results may help to confirm Boston Whaler's results. Warren
sosmerc	posted 03-15-2007 10:27 AM ET (US) WT...I'll bet Whaler didn't test with a Laser II :) The info you are providing is great! And I think it will be especially helpful if you give us some test results AFTER you have your prop repaired by these Propscan folks. I for one am very interested to see if going to the extra expense provides a noticeable improvement. I have certainly read good things about Propscan services, but I don't think there are many small boat operators that take advantage of the process due to the cost. By the way, what hole is your engine currently mounted in? (with a Laser II you could probably raise the engine as high as it can go and it would still work well) Thanks again for your "reports".
WT	posted 03-15-2007 10:51 AM ET (US) sosmerc: Boston Whaler did indeed us a 20 pitch Laser II. I believe that all new 170 Montauks purchased with the 90 Veradito come with the 20 pitch Laser II. http://www.whaler.com/Rec/pdfs/170MontaukEng.pdf I bought my used prop on Ebay for $165 with a hub kit. A new prop was quoted at $300-450 without a hub kit. The seller said the prop had 5 hours on it. The reason for him selling the prop was because he wanted a stern lifter not a bow lifter. The real reason was probably because the prop is slightly out of balance. Here's some information about Prop Scan. They will check your prop for free. http://www.props.com.au/ I figure that a prop is one of the most important pieces of equipment for boating performance, so I may as well make sure that it is tuned for my boat. Warren
WT	posted 03-15-2007 11:33 AM ET (US) My outboard is mounted on the second hole meaning I could move it up 3 more holes.
sosmerc	posted 03-15-2007 06:15 PM ET (US) I stand corrected...I see they did use a Laser II. That really surprises me, as many of the tests I've seen Whaler conduct they seem to prefer to use a less expensive prop such as the Vengeance....but never the less, I'm glad to see they used it. I wonder if they ever really played much with engine height. If the gearcase performs as well as the L4 2 stroke version I know for a fact that the prop will work with the engine all the way up. I once rigged a 17 Super Sport with a 1988 100hp L4 and we put the motor as high up as it would go and tried the Laser II. It worked very well, and the high engine height eliminated a spray issue with that gearcase. He pulled skiers no problem, and ran pretty fast at top end. We put dual cable steering on it to tighten things up to reduce chine walk. Merc makes a much less expensive version of the Laser II called the Lightspeed. It doesn't have as nice a finish and the last one I ran didn't have the PVS system, but it performed just like the Laser II.
imko	posted 03-16-2007 09:28 AM ET (US) Warren, I have also a Montauk 170 with a 90 4-stroke (2003) I use a Laser II 13,25 x 20" mounted third hole (middle) Top speed 44,1 at 5800-5900 rpm. Best regards, Imko
WT	posted 03-16-2007 11:28 AM ET (US) Imko: Wow! Did you notice a HUGE difference between the stock 18 pitch Vengeance and the 20 pitch Laser II? Did you raise you outboard 1 hole or did it come mounted in the middle hole? I think I'm going to have my motor raised to the middle hole the next time I bring my boat in for service. Are your vents opened on your Laser II? If they are opened perhaps you could use some medium plugs to gain 200 rpm at WOT. Are you sure your Laser II is 13.25 inches in diameter and not 13.5 inches? I just picked up my Prop Scanned Laser II. I may not get much improvement in speed at WOT. In order to match the size of all 3 blades on my prop, my overall pitch was reduced by .43 inches. My pitch is now 19.118, it was 19.548 inches. I suppose the smaller pitch was recommended because I sometimes carry 1 or 2 additional fishermen on board. I could also close my vents. Warren
WT	posted 03-16-2007 11:42 AM ET (US) My old 2004 Mercaha 90 would hit 42 mph prior to me loading up the 170 Montauk with additional weight. After I added the kicker, Turbo Lift, additional batteries, etc., my WOT speed decreased to about 39 mph. Warren
imko	posted 03-16-2007 05:29 PM ET (US) Warren, There is a big difference between this 2 props! I use the std. small vent plugs. Top speed is with 1 person on board, and 1 tank fuel. With the Vengeance 18"prop i hit the rev. limiter (6200-6300 rpm) Mid range is a lot better with the Laser II. (hole shot not!) I rased also my console 4 inch , and made a modification for the bow rail. http://i75.photobucket.com/albums/i285/ihoekstra/DSCF0536.jpg Good look with youre new Veradito!! Here it is rated for 100 hp now : http://www.boatservicedannijs.nl/nieuw_motoren_specs.php?id=149 Regards, Imko