Mercury MerCruiser Quicksilver Stretch Belt Tool 8M0146862
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Mercury / Quicksilver Stretch Belt Tool — 8M0146862
The Mercury Quicksilver 8M0146862 Stretch Belt Tool is a specialized OEM service tool designed to install single-use stretch alternator belts on late-model Mercury outboard engines. Instead of prying the belt on manually, this tool safely guides the belt onto the pulley while the engine is briefly “bumped” with the starter.
What It Does
Many newer Mercury outboards use stretch-fit alternator belts that do not use a tensioner. These belts must be stretched onto the pulley during installation.
This tool:
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Hooks over the flywheel
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Guides the belt onto the alternator pulley
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Prevents belt damage or fraying
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Allows one-hand installation
The design reduces installation time to a couple of minutes and avoids damage that can occur when using pry bars or screwdrivers.
Compatible Engines
Primarily used on late-model Mercury V-6 and V-8 FourStroke outboards, including:
3.4L V6 FourStroke
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175 HP
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200 HP
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225 HP
4.6L V8 FourStroke / Verado
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200 HP
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225 HP
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250 HP
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300 HP
Typically applies to engines serial number 2B529482 and newer that use stretch alternator belts.
Key Features
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Genuine Mercury / Quicksilver OEM tool
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Fits 5-rib and 6-rib pulleys
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Forged zinc-plated steel for corrosion resistance
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Smooth belt radius prevents belt damage
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Molded grip for secure handling
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Designed for 175–300 HP Mercury FourStroke engines
Typical Use Case
Used during service when replacing the alternator belt on engines such as:
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Mercury 300 Verado
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Mercury 250 Pro XS
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Mercury 200–225 FourStroke
Without this tool, installing the belt can be difficult and may damage the belt.
✅ Quick Tip:
Stretch belts are usually single-use. Once removed, they should not be reinstalled—a new belt should be fitted using the installation tool.
Shipping: Ships same or next day for fast Canada wide shipping.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.