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![Ronstan Series 40 All Purpose Block - Single Upright Lead [RF41171]](https://cdn.shopify.com/s/files/1/0405/8454/4408/files/70602XL.jpg?v=1745513825 "Ronstan Series 40 All Purpose Block - Single Upright Lead [RF41171]")
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Ships within 48 hours · Estimated delivery Jun 14 - Jun 19
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Description
Ronstan Series 40 All Purpose Block - Single Upright Lead [RF41171]Series 40 All Purpose Block Single Upright Lead Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Ideal for high load applications. Wear resistant sheave material, in lightweight, self lubricating polymer, is suitable for use with rope or wire. Applications: Typically used for halyards at the mast base. Materials: UV stabilised acetal sheave Grade 316 stainless steel load housing
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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- Standard Shipping : 3-10 business days
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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.
- To process your return/exchange, please contact us at [email protected]
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4.6 ★★★★★
Based on 1949 reviews
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Product Reviews
★★★★★ 5
OEM recommended.
Style: Mineral, Pattern Name: Quart - 1 Pack
It is the OEM recommended oil for my 2017 9.9 outboard. Arrived quickly and in a sealed plastic bag. No leaks. This is 32 oz and the motor only calls for 27 oz so enough for topping up in needed.
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Reviewed in the United States on February 23, 2026
★★★★★ 5
Great for Mercury 4-stroke outboard
Style: Mineral, Pattern Name: Gallon - 1 Pack
The price was too good to pass; I stocked up on 3 years' worth of oil. QuikSilver is OEM Mercury oil, and this stuff has long shelf life if you can store it in stable indoor temperature/away from temperature extremes. Great buy overall, highly recommended.
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Reviewed in the United States on June 20, 2025
★★★★★ 5
VEPURLT Alighnment Tool
Great quality and shipped very quickly
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Helpful Tool Kit for MerCruiser Maintenance
This tool kit made servicing the gimbal bearing and checking engine alignment much easier than improvising with generic tools. The machining looks solid and the tools fit properly with MerCruiser components. Helpful set for anyone doing their own marine maintenance work. Definitely useful to have around for sterndrive service jobs.
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Saves So Much Time, Perfect Fit On Mercruiser Pre-Alpha Outdrive.
This is a very useful kit. Perfect fit to exchange and align the gimbal bearing on a Mercruiser MR/Pre-Alpha Outdrive. The metal rods are strong and well machined to fit the gimbal bearing and the template lines up great with the housing studs. The overall production quality is very good. Great value because the tools are very durable but for me the biggest value is the time saved. I had the bearing out in about 10 minutes. The ability to line up the bearing before attempting to attach the outdrive upper gear unit is very convenient and saves so much time. This are simple tools, very easy to use.
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Reviewed in the United States on May 1, 2026
