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Thread: Sport Jet Hi Skew Impellers Now Come Standard

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    Default Sport Jet Hi Skew Impellers Now Come Standard

    Sport Jet pumps now come standard with Hi Skew impellers....

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    Member Bob the fisher's Avatar
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    Kevin, I have the sport jet on my phantom but is was built last Feb before they were standard. Can you tell me what the benefits are from the high skew impellers as compared to the regular impellers? Quicker out of the hole? Quicker top end? What? And are they spendy?...thanx man... "fishon"


    Quote Originally Posted by Kevin Turner View Post
    Sport Jet pumps now come standard with Hi Skew impellers....
    "Fisherman for Life" and "Phantom owner Forever"

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    Bob the high will give you better hole shot. But you loose top end. I have one and ran it the second season I had my boat. Then last year I went back to the stock impeller. I like stock one better. Bob you welcome to use my high skew. Before go spend what ever they cost now days.
    Do I give my friends advice? Jesus, no. They wouldn't take advice from me. Nobody should take advice from me. I haven't got a clue about anything..

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    Quote Originally Posted by akmike30 View Post
    Bob the high will give you better hole shot. But you loose top end. I have one and ran it the second season I had my boat. Then last year I went back to the stock impeller. I like stock one better. Bob you welcome to use my high skew. Before go spend what ever they cost now days.
    The skew now is designed for the 200 where the old skew was for the 250. We're going to test it agianst the standard during the load test of brand-x and will see if it's worth the upgrade. More to follow.

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    Member halibutcollier's Avatar
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    Quote Originally Posted by Halibutgrove View Post
    The skew now is designed for the 200 where the old skew was for the 250. We're going to test it agianst the standard during the load test of brand-x and will see if it's worth the upgrade. More to follow.
    I cant wait till u post the results Mel.

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    Member Bob the fisher's Avatar
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    Riton! Riton! Akmike30 but i checked around and it does sound terribly impressive to me at this time Mine is still fairly new anyway. I didn't suckup that much $&#@ last summer so we're good. I been inside the pump once already site seeing and things look fine... thanx for the offer though... cya on the Knik... "fishon"

    Quote Originally Posted by akmike30 View Post
    Bob the high will give you better hole shot. But you loose top end. I have one and ran it the second season I had my boat. Then last year I went back to the stock impeller. I like stock one better. Bob you welcome to use my high skew. Before go spend what ever they cost now days.
    "Fisherman for Life" and "Phantom owner Forever"

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    Sponsor Exactboats's Avatar
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    Our new duplex Hi-skews are getting pretty good results in performace compared to a stock impeller. Here is a bit if feed back with our 3 blade Hi-Skew in stalled in a 175 SJ pump. Pretty impressive I would say and with having the thicker blades thet are way more durable giving you more boating hrs before doing a rebuild.

    Feedback:
    I have about a half hour run time. Iíve been busy and the weather has been pretty wet. I did notice it jumps on step with less throttle and stays on step at lower RPMís . I picked up about 4 MPH at 4200 RPM about 28-32 MPH depending on water conditions. Top speed seems about the same 44 MPH @ 5000 RPM before 40-42 @ 5800-6000 RPM but the sleeve was pretty worn. @ factory spec I would get 25-26 MPH @ 4300 RPM and 44 @ 5200 RPM.
    Claude:

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    Exact boats. What is the cost of your impeller. If you data is true that better than we got with the high skew.
    Do I give my friends advice? Jesus, no. They wouldn't take advice from me. Nobody should take advice from me. I haven't got a clue about anything..

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    Sponsor Exactboats's Avatar
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    This is another test stat's sent by a customer using a SJ 175 with a stock 4 blade compared to our new 3 blade Hi-skew impeller.

    Hole shot wot ---------- @5400 rpms with stock 4 blade or 3 blade Hi-skew ------ no change in wot rpms.
    Hole shot --------------- Stock 4 blade 6.5 seconds.
    Hole shot --------------- 3 blade Hi-skew 5.0 seconds ------- 1.5 seconds quicker in hole shot over stock 4 blade.
    Stock 4 blade ---------- @4000 rpms 21mph.
    Hi-skew 3 blade ------- @4000 rpms 25 mph ---------- 4 mph gain in speed over the stock 4 blade.
    Top wot speed -------- @5400 rpms --------- stock 4 blade 44 mph -------- 3 blade hi-skew 44 mph -------- no top end speed increase.
    Also can stay on step as low as 3400 to 3600rpms compared to 3800 rpms.


    Claude:

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    Sponsor Exactboats's Avatar
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    We also did a test using a stock 4 blade Hi-skew compared to our new 3 blade Hi-skew using a 200 Optimax with a smart craft gauge.

    New 3 blade Hi-skew:
    Wot hole shot rpms ---- 5600.
    Wot on plane rpms ----- 5490 --- 32 mph.
    Cruise rpms ------- 4400 ------ 22 mph @ 7.7 gph.
    Cruise rpms ------- 4100 ------ 18 mph @ 5.5 gph.

    Stock 4 Blade Hi-skew:
    Wot hole shot rpms --- 5400.
    Wot on plane rpms ---- 5300 --- 32 mph.
    Cruise rpms ----- 4400 ------ 22 mph @ 8.2 gph.
    Cruise rpms ----- 4100 ------ 18 mph @ 6.1 gph.

    Our new 3 blade duplex ss Hi-skew retails @ $800.00, 4 blade duplex ss Hi-skew @ $900.00

    Claude:

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    Member skybust's Avatar
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    I had me impeller rebuild at greatland and it fit better than a new impeller for the cost Ill stick with the rebuild has great hole shot
    Is it opening day of duck season yet
    Member of Alaska Waterfowl Association

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    Quote Originally Posted by Halibutgrove View Post
    The skew now is designed for the 200 where the old skew was for the 250. We're going to test it agianst the standard during the load test of brand-x and will see if it's worth the upgrade. More to follow.
    Halibutgrove I am curious do you have any photos of the old and new shew. I believe there is only one Merc design of a Hi-skew designed more the 240 & 250's. Too bad we are so far away from AK I would like to be there for the testing of brand-X also comparing impellers. It's definately worth the up grade when your running at lower rpms saving fuel. Maybe I should ship one of our new 3 blade Hi-skews to put through the test also.

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    Quote Originally Posted by Exactboats View Post
    Halibutgrove I am curious do you have any photos of the old and new shew. I believe there is only one Merc design of a Hi-skew designed more the 240 & 250's. Too bad we are so far away from AK I would like to be there for the testing of brand-X also comparing impellers. It's definately worth the up grade when your running at lower rpms saving fuel. Maybe I should ship one of our new 3 blade Hi-skews to put through the test also.
    I'll see if I can obtain some photos of the new Hi-skew. The new skew is design specifically for the 200 by merc. As you said the older one was designed for the 250. Phantom indicates the holeshot is better but top speed is the same and WOT rpm is higher by 200 over the old standard impeller. Send us you impeller and we'll load test it as well in the same boat with the same loads.

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    Sponsor Exactboats's Avatar
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    These are two impellers a 4 blade Hi-Skew on the left and a standard 4 blade that came stock in a 200 optimax. That's why we developed a new duplex 3 blade for the 175 & 200's and 4 blade 240 & 250's. Thicker blades will maintain a tighter clearance between the blades and ss wear ring compared to stock blades. Note the difference in thickness of our blades compared to stock ones. I am sure if your going to be pumping alot of gravel through the pump the thicker duplex blades will out last the thinner blades.

    :
    Claude:

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    [QUOTE=Exactboats;1089497]This is another test stat's sent by a customer using a SJ 175 with a stock 4 blade compared to our new 3 blade Hi-skew impeller.
    Hole shot --------------- Stock 4 blade 6.5 seconds.
    Hole shot --------------- 3 blade Hi-skew 5.0 seconds ------- 1.5 seconds quicker in hole shot over stock 4 blade.
    Just curious what the time was related to? Was it the time the boat came on plane?

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    Quote Originally Posted by Exactboats View Post
    We also did a test using a stock 4 blade Hi-skew compared to our new 3 blade Hi-skew using a 200 Optimax with a smart craft gauge.

    New 3 blade Hi-skew:
    Wot hole shot rpms ---- 5600.
    Wot on plane rpms ----- 5490 --- 32 mph.
    Cruise rpms ------- 4400 ------ 22 mph @ 7.7 gph.
    Cruise rpms ------- 4100 ------ 18 mph @ 5.5 gph.

    Stock 4 Blade Hi-skew:
    Wot hole shot rpms --- 5400.
    Wot on plane rpms ---- 5300 --- 32 mph.
    Cruise rpms ----- 4400 ------ 22 mph @ 8.2 gph.
    Cruise rpms ----- 4100 ------ 18 mph @ 6.1 gph.

    Our new 3 blade duplex ss Hi-skew retails @ $800.00, 4 blade duplex ss Hi-skew @ $900.00

    Claude:
    The cruise rpms/consumption show interesting results. It takes X amount of power to produce X amount of speed.
    Your cruise rpms and speed are exactly the same which indicates to me, all other things equal, that both impellers are producing the same amount of thrust at the same rpms. Apparently 4 blade is absorbing more power since it's using much more fuel. Consuming .5gph seems to be a huge difference and indicates a huge waste of energy somewhere. Any idea why this would be the case?

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    Member Bob the fisher's Avatar
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    You tellem you fricken pitbull... "fishon"


    Quote Originally Posted by Halibutgrove View Post
    The cruise rpms/consumption show interesting results. It takes X amount of power to produce X amount of speed.
    Your cruise rpms and speed are exactly the same which indicates to me, all other things equal, that both impellers are producing the same amount of thrust at the same rpms. Apparently 4 blade is absorbing more power since it's using much more fuel. Consuming .5gph seems to be a huge difference and indicates a huge waste of energy somewhere. Any idea why this would be the case?
    "Fisherman for Life" and "Phantom owner Forever"

  18. #18

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    This is the test from the summer of 2010. The rebuilt impeller and liner are from Gary at Greatland Welding.- Glen

    STOCK IMPELLER LINER HIGH SKEW IMPELLER & STOCK LINER RE-BUILT IMPELLER & SS SLEEVE
    750 LBS 750 LBS 750 LBS
    RPM MPH GPH MPG db RPM MPH GPH MPG db RPM MPH GPH MPG db
    3500 21.1 4.8 4.39 93.5 3500 18.8 4.5 4.17 93.5 3500 21.1 4.3 4.3 93.5
    4000 26.9 6 4.48 94 4000 26 6 4.33 94 4000 28.2 6.3 4.47 94
    4500 32.4 8.4 3.85 96 4500 31.1 7.9 3.93 96 4500 33.6 8.7 3.17 96
    5000 37 11.8 3.13 96.5 5000 37.5 11.8 3.17 96.5 5000 34.4 12.5 2.75 96.5
    5600 42.6 18.5 2.3 98 5600 43.2 16.3 2.36 98 5450 44.5 18.4 2.41 98

  19. #19

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    Had to do two posts due to size.

    STOCK IMPELLER LINER HIGH SKEW IMPELLER & STOCK LINER RE-BUILT IMPELLER & SS SLEEVE




    2,240 LBS 2,240 LBS 2,240 LBS
    RPM MPH GPH MPG db RPM MPH GPH MPG db RPM MPH GPH MPG db
    4000 11.6 6 1.93 94 4000 10.5 6 1.75 94 4000 12.4 6.3 1.96 94
    4500 25.7 8.4 3.05 96 4500 25.7 7.9 3.25 96 4500 27.6 8.7 3.17 96
    5000 35.4 11.8 3 96.5 5000 35.7 11.8 2.85 96.5 5000 34.4 12.5 2.75 96.5
    5600 40.8 18.5 2.3 98 5600 40.9 18.3 2.23 98 5450 39.4 18.4 2.14 98
    3,725 LBS 3,725 LBS 3,725 LBS
    RPM MPH GPH MPG db RPM MPH GPH MPG db RPM MPH GPH MPG db
    4500 10 8.4 1.19 96 4500 9.7 7.9 1.22 96 4500 9.5 8.7 1.09 96
    5000 26.4 11.8 2.23 96.5 5000 24.4 11.8 2.06 96.5 5000 28.5 12.5 2.28 96.5
    5600 36.5 18.5 1.98 98 5600 37.1 18.3 2.02 98 5450 36.8 18.4 2 98

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    Sponsor Exactboats's Avatar
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    [QUOTE=Halibutgrove;1089944]
    Quote Originally Posted by Exactboats View Post
    This is another test stat's sent by a customer using a SJ 175 with a stock 4 blade compared to our new 3 blade Hi-skew impeller.


    Just curious what the time was related to? Was it the time the boat came on plane?
    Yes in hole shot the time it took to get on step.


    Claude:

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