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Old 10-11-2017, 10:41 AM   #21
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I think it was about $100 for the Sherwood 1700 size, including shipping, via PayPal...

-Chris
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Old 10-11-2017, 01:07 PM   #22
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Some Silicon grease on the impeller it'self makes a big difference and a little on the shaft for easier removal next time , quite a few impeller suppliers include a little tube of silicon or other grease with the impeller, Yes the larger impellers can be a real struggle to fit, just to note when bending the rubber impeller vanes to pass the cam, be sure you bend in the correct direction of rotation other wise even though they do normally flip around, you can damage them, once started in the housing I often use a little gentle force in the prudent use of a rubber hammer,

Also be careful with the type of grease used as some impellers dont like various petroleum products although it usually is gone with in a few hours,

Cheers Steve
OR go up to the Adult Toy Store and buy some lubricant.
It comes in water soluble and liquid silicon. No need to buy the flavored kind, your engine wont care. SMIRK
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Old 10-11-2017, 02:06 PM   #23
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I paid abut $50 for my Lehman tool.
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Old 06-27-2020, 02:55 PM   #24
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[QUOTE=Clemson101;597486]It is shameful for me to admit I toasted my impeller due to not re-opening the fresh water engine intake seacock after systems check. Luckily (I thought) I had a spare onboard. After removing the old impeller, I attempted to install the new one. I applied some Dawn to the new impeller but could not get it to engage more than half way. After 3 hours of making various attempts to twist the new impeller and checking for obstructions or if there was a "key" notch (not one I could find), I finally had to call Boat US. Attached a picture of the impeller housing. Any tricks to getting the new one back on?

My vessel is a 2015 Beneteau ST 34 with a 425 Hp Cummins Diesel model QSB6.7.
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Old 06-27-2020, 03:00 PM   #25
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An update from my 2017 post. I again toasted an impeller again today. Had a spare, used zip ties to compress the fins of the impeller, used a lot of lube everywhere and fashioned a sleeve out of my wife’s Evian bottle. Worked like a charm. I’m currently sitting her ordering another spare and I’m going to order the impeller installer previously mentioned. Hope it will never be needed.
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Old 06-27-2020, 03:17 PM   #26
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I had similar problems on an 8.3 cummins with Sherwood pump. There were two issues;


First was just getting the impeller compressed and holding it compressed while tapping it into the pump housing. I tried zip ties and other things to no avail. It was like trying to pin down a greased pig. I finally bought a full cuff piston ring compressor and it worked perfectly for the compressing part of the problem.


The second problem was that as the impeller was driven back into the housing, the fins would expand out when they reached the water grate and would snag on it. Rotating the impeller would solve the problem, but you can't do that with a gear-drive impeller.


I finally realized that it was much easier and faster to remove the entire pump and do the impeller swap on the bench with the piston ring compressor, and being able to rotate it while tapping it in.


The lesson learned is that with a larger engine and pump, swapping impellers is not a trivial task. And definitely not something I would want to do in a hot engine room while disabled and rolling in crappy seas. This is why I always change them as part of routine maintenance, regardless of hours or apparent condition. I just don't want one failing at sea.
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Old 06-27-2020, 03:22 PM   #27
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Impellertool.com
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Old 06-27-2020, 04:28 PM   #28
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Impellertool.com
Thanks.
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Old 06-27-2020, 07:08 PM   #29
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They are really awesome. No affiliation. But the tool allows me to be able to change the starboard impeller and makes the port impeller easier. The starboard impeller was almost impossible to change before the tool. The mechanics at the yard where the PO stored my boat said they drew straws to see who would get stuck doing it since it was so bad. Now I can do it in 20 minutes.
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Old 06-27-2020, 08:22 PM   #30
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Clemson101,
You can avoid (or at least reduce the chance) of impeller damage due to forgetting to open the thru hull by installing an Aqualarm flow alarm. It is loud and sound anytime the raw water flow is not adequate (as in blocked thru hull, valve not open, etc.). They are not expensive, maybe $100. Easy to install.
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Old 06-27-2020, 08:25 PM   #31
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What does he get for that thing? A few other similar ones around the interweb, seem very pricey for what they are ($150 - $450). No prices on his website which $ugge$t$...
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Old 06-27-2020, 09:41 PM   #32
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What does he get for that thing? A few other similar ones around the interweb, seem very pricey for what they are ($150 - $450). No prices on his website which $ugge$t$...
I purchased one from him a couple of years ago. I paid $120 for the Sherwood P1716 pump (17000K impeller) Installation Tool for 6BTA Cummins. That included USPS Overnight shipping. Really a fantastic tool and beautifully made.
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Old 06-27-2020, 10:09 PM   #33
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Here's another one!

Impeller tool.
Attached Thumbnails
Impeller puller.jpg  
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Old 06-27-2020, 10:27 PM   #34
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Impeller tool.
Is this tool for installing the impeller or removing it?
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Old 06-27-2020, 10:28 PM   #35
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What does he get for that thing? A few other similar ones around the interweb, seem very pricey for what they are ($150 - $450). No prices on his website which $ugge$t$...
The one for my Lehman SP225 was in the $40 to $50 range if I remember correctly.
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Old 06-28-2020, 06:00 AM   #36
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Is this tool for installing the impeller or removing it?
Removing. Our removal process just used a single bolt; didn't need that black thing...


Quote:
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What does he get for that thing? A few other similar ones around the interweb, seem very pricey for what they are ($150 - $450). No prices on his website which $ugge$t$...
Mine was $98 suitable for the 450C Cummins impeller (Sherwood pump). Worked great.

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Old 06-28-2020, 06:04 AM   #37
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Dave
The tool Codger2 showed is the removal tool.
I had my yard change my impeller last season in prep for a cruise as I was busy doing other tasks. After some attempts with their tools they finally asked about using mine, like pictured, and all went smoothly.
The only improvement that helps is the supplied metric bolt isn't long enough to extract the impeller. I was able to locate some longer full thread metric bolts that make the removal much easier.
I also have and recommend the ratchet piston ring compressor for installation of the new impeller.
I haven't found it necessary to remove the pump to do the R&R so far.
If you have and use the tool the impeller # have to include a "T" as the last digit indicating it is threaded.
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Old 06-28-2020, 06:09 AM   #38
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Removing. Our removal process just used a single bolt; didn't need that black thing...




Mine was $98 suitable for the 450C Cummins impeller (Sherwood pump). Worked great.

-Chris
Christian
Must be a very different looking impeller than photo shown? The ID of my gun looks like the photo and as rather large and the black insert is required to screw into the hub. Then the bolt is used to apply the pulling force.
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Old 06-28-2020, 06:19 AM   #39
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Christian
Must be a very different looking impeller than photo shown? The ID of my gun looks like the photo and as rather large and the black insert is required to screw into the hub. Then the bolt is used to apply the pulling force.
Yes, the impeller for our Sherwood pump was threaded a similar size as the (pictured) bolt. I used a couple different length 3/4" x 16 bolts to back the impeller out.

Sherwood makes a similar tool with a T-like handle too, but it was really an off-center T and there wasn't easy room to swing the handle.

Easier to put a battery-powered ratchet drive on a standard bolt head, out comes the impeller in about 30 seconds.

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Old 06-28-2020, 06:34 AM   #40
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I modified a couple of bolts to remove the impeller and promptly misplaced them. I know it is on the boat somewhere. SIGH
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