SKU: 89808720501

GROCO Thru-Hull Installation Tool

Sale price$165.85 Regular price$184.28
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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18

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Description

GROCO Thru-Hull Installation ToolThru Hull Installation Tool Thru Hull Installation Tool The Concept: THT 530 makes the installation of standard GROCO thru hull fittings possible by a single installer. Slide the thru hull fitting, flanged end first, over the tool. (It will stop at the proper step.) Tie a length of monofilament to the eye and place it into the already cut hole in the hull of the boat. Apply caulking to the flange of the fitting, and pull the fitting through the hole

Thru-Hull Installation Tool 

Thru Hull Installation Tool

The Concept:

THT-530 makes the installation of standard GROCO thru-hull fittings possible by a single installer.  Slide the thru-hull fitting, flanged end first, over the tool.  (It will stop at the proper step.)  Tie a length of monofilament to the eye and place it into the already-cut hole in the hull of the boat.  Apply caulking to the flange of the fitting, and pull the fitting through the hole and against the hull from inside the boat.  Thread the mono-filament through the locknut or seacock. With the fitting pulled firmly against the hull the locknut or the seacock may be screwed onto the fitting.

THT-530 fits GROCO Thru-hull Fitting Sizes from 1/2" through 3"


Manufacturer Part Numbers: THT-530
GRP:WRO
Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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SKU: 89808720501

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4.5 ★★★★★
Based on 15 reviews
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T
Verified Purchase
TN
Los Angeles, US
★★★★★ 5
Works fine 3 months in
Installed a few months ago, before the winter. I was chasing a no-start after replacing the old battery. We've seen single digit temps in the meantime and it is working well. The fit is perfect in a 2010 focus. If you can slide it in from the side and not drop it in from the top, you can replace it without taking off the intake manifold. There are useful videos online showing this. Good luck!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 28, 2025
C
Verified Purchase
Chris C.
Bozeman, US
★★★★★ 1
Will be returned as soon as I have a replacement.
When engine is cold starter works fine with engine is hot. It will free wheel the starter motor, but not kick the starter gear into the ring gear on the motor. Watch video and listen it actually did it twice at this location but I didn’t catch the first one on the video.
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Reviewed in the United States on December 25, 2025
J
Verified Purchase
Jesus morales
Belleville, US
★★★★★ 5
Good fit
Works great and very affordable price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 30, 2025
B
Verified Purchase
Billy snead
Bozeman, US
★★★★★ 4
Reasonably priced easy to install starter
Install starter went on pretty easy so far so had it on a few days now and it’s working.
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Reviewed in the United States on August 12, 2025
R
Verified Purchase
Ricky J. Umbarger
Lake Worth, US
★★★★★ 5
fits well
went into my sisters 05 ford focus fit well and took about 45 min. to install. also a very good price.
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Reviewed in the United States on February 21, 2024

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