Ronstan Series 45 Core Block - Single - Swivel Shackle Head - RF44100

Ronstan Series 45 Core Block - Single - Swivel Shackle Head - RF44100

Marsoni

M251S

$53.99

Get it in 3 business days with 1 day shipping. Friday, May 29

Ronstan Series 45 Core Block - Single - Swivel Shackle Head - RF44100Series 45 Core Block Single Swivel Shackle Head Core Blocks are a true all round solution. A tuned 2 stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets,

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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!

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Reviewed in the United States on December 28, 2025

Verified Purchase

Chris C.

Carnegie, 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

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Jesus morales

Lexington, US

★★★★★ 5

Good fit

Works great and very affordable price

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Reviewed in the United States on January 30, 2025

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Billy snead