★★★★★ 5
Works as it should
Works as it should
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Reviewed in the United States on March 24, 2026
COMP Cams Spring Seat Cutter For GM Vor
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
COMP Cams Spring Seat Cutter For GM VorCuts cylinder head spring seats to 1. 320" diameter Cuts to . 630" inner diameter. For installing larger springs and hardened spring seats on GM Vortec heads. Requires the use of an arbor pilot, which are available for 5 16", 11 32" and 3 8" valve stem sizes. Catalog User 1
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Based on 1117 reviews
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Product Reviews
★★★★★ 4
Four Stars
Just what I needed
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 14, 2016
★★★★★ 5
Functioned as advertized.
Installed these in my Whalers 96 200 Offshore. No issues, used permatex gasket compound on aluminum engine parts after cleaning with fine brass wire wheel.
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Reviewed in the United States on November 20, 2024
★★★★★ 5
Fits 1988 Sea Ray V-135 2 stroke (Mercury)
For those of you with the 135 hp
mercury that was branded as the "Sea Ray 135" and paint matched to the boat (i.e. Seville's and some others) this is the 147 degree thermostat for that motor. My Seville is an '88 and It's difficult to cross reference the serial numbers on those motors when searching for parts. Only buy Quicksilver parts for these motors. Happy to find them on Amazon because Boats.net as an example, is not clear on what you're getting.
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Reviewed in the United States on August 3, 2024
★★★★★ 5
fixed issue
stopped the overheat issue on my outboard!!!
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Reviewed in the United States on August 6, 2025
