Engine Tips & Info

1)  Plus-Series Engine Information.
2)  Repowering SternDrives & Inboard Engines.
3)  Repower with a new MerCruiser Using Emissions Control
4)  Return the Old Engine for a New MerCruiser without Emissions Control
5)  Why Use a Mercury Remanufacturing Product
6)  Outboard Engine Shaft Length


1)  Plus-Series Engine Information

  QuickSilver Plus-Series Engines:

The PLUS-SERIES ENGINES from QUICKSILVER are 100% new construction, and contain all the parts a CRATE ENGINE lacks.
These are drop in ready new marine engines.
Based on popular MerCruiser models, these are 100% new engines that are built with marine grade engine internals and other NEW marine components.
QUICKSILVER PLUS‑SERIES engines are 100% new factory engines for repowering classic boats built before 2008 in California, and prior 2010 for the other 49‑states.
Because these are completely new engines and not a major repair assembly, the old engine being replaced is to be returned per EPA 1068.240.
Plus-Series Engines have a Mercury Marine 1-Year Warranty plus additional 2-Year Mercury Product Protection Warranty.
Since the focus of PLUS‑SERIES ENGINES is repower, many parts included in new MerCruiser engines used for new boat construction are not included.
Parts such as: transoms, trim pumps, Y‑Pipes, rigging, props, boat harnesses, riser kits, closed cooling kits, steering cylinders, lubes, and many other parts required for a successful repower must all be purchased separately.
Adapting Plus Series engines to specific applications may require some parts to be transferred from the engines coming out of the boat or purchased separately.
Examples include:
• Transfer of flywheel housings, couplers, and other hardware to adapt to various makes of drives and transoms
• Changing engine couplers to match specific transmissions, or customer preferences
• Changing engine mounts from front to side, or using solid engine mounts
• Use of various Quicksilver kits to meet customer preferences or the specified installation requirements found in the     Repower Reference Manual included with the engine

Plus-Series Engines have a Mercury Marine 1-Year Warranty plus additional 2-Year Mercury Product Protection Warranty.

2)  Repowering Sterndrives and Inboard Engines

  • With 2010 EPA Exhaust Emissions Regulations – October 2009

Mercury has led the development and implementation of low-emission marine engines since they were initially proposed in 1994. It has been a long developmental path, working with U.S. EPA, U.S. Coast Guard, California ARB, NMMA and technical partners throughout the industry to bring to reality a practical, safe and effective products to reduce exhaust emissions from marine engines.

MerCruiser introduced the first comprehensive lineup of low-emission products in 2008 for use in California. In 2010, it’s time to do the same throughout the USA.

New sterndrive inboard boats in 2010 will require engines equipped with emissions control, or use an engine family exempted from that requirement. In 2010, exempted engines include the following:

• Engines manufactured prior to Jan. 1, 2010
• 4.3L & 8.1L engines discontinued by General Motors
• Racing engines (500+ HP) fall under a separate regulation

Until recently, these same requirements were scheduled to apply to new engines used to repower older boats. However, recent revisions to the EPA regulations now allow older boats to be repowered or serviced with new engines not equipped with emissions control built after January 1, 2010.

There are some options in the provisions, so other manufacturers’ programs may vary.

The program offered by Mercury was chosen to maximize product selection to our customers – ensure product availability – and to protect our environment.

Repowering your pre-2010 sterndrive or inboard boat with Mercury products can be summarized with three simple options:

  • Repower with a new MerCruiser using emissions control
  • Return the old engine for a new MerCruiser without emissions control
  • Use a Mercury Remanufacturing product

3)  Repower with a new MerCruiser Using Emissions Control

From the 135 HP 3.0L MPI to the all new 430 HP 8.2 MAG H.O., MerCruiser is your logical choice for repowering your sterndrive or inboard boat with emissions control.

Our emissions control engines are available with SeaCore, Horizon and Scorpion models with a variety of options, including our DTS & Axius propulsion-control technologies for some models.

There’s a MerCruiser equipped with emissions control for every demanding application, including houseboats, tow boats and large cruisers.

No other manufacturer can match the models offered, parts available and technical service offered by MerCruiser.

An engine equipped with emissions control will satisfy the EPA requirement to repower with the same or cleaner Technology in older boats.

Engines equipped with emissions control benefit from better fuel economy and deliver the same power as older-technology engines. Fuel injection is mandatory.

There are upgrades to the exhaust system with the addition of catalysts and oxygen sensors. A more powerful engine controller is required to monitor the emissions performance and prevent misfires at all engine speeds.

Each engine is certified to exceed a demanding durability cycle for unmatched reliability and peace of mind.

Most importantly, a MerCruiser with emissions control provides years of enjoyable boating while reducing the emissions for a cleaner environment.

4) Return the Old Engine for a New MerCruiser without Emissions Control

A brand new MerCruiser without emissions control can be used to Repower a boat not originally equipped with an emissions control engine if the new engine is not compatible with the older application.
Incompatibility of an emissions control engine means it does not fit an old boat without extensive modification to any of the following :

  • Exhaust system
  • Electrical system
  • Steering, throttle or shift rigging
  • Incompatible power rating
  • Incompatible engine dimensions (height, length, width, etc.)

Federal law mandates that the engine being replaced must be returned to the manufacturer of the new engine –EPA Code 1068.240. This is similar to the Automotive sector’s “Cash for Clunkers” program that required destruction of the car to receive a rebate. The ability to purchase engine with no emissions control is the “rebate.”

Simply return the old engine in the familiar MerCruiser returnable engine container. This satisfies the return of the old engine and helps to fulfill the $300 returnable container deposit. All freight for these returns is paid by
Mercury. Engines and containers are to be returned to:Quicksilver Remanufacturing. 

For answers to questions concerning returns, call 909-599-0531.

5)  Why Use a Mercury Remanufacturing Product

Mercury Remanufacturing offers factory Certified Pre-Owned (CPO) MerCruiser engines and Mercury Remanufacturing’s own line of remanufactured sterndrive and inboard components that can be used to repower pre-2010 boats in 49 states, and pre-2008 boats in California.
Whether Certified Pre-Owned or Plus Series, each Mercury Remanufacturing engine comes standard with a factory backed one-year limited Mercury P&A warranty. They also qualify for up to two years of Mercury Product Protection.
Certified Pre-Owned Mercruiser engines have been brought back to a fully functional state after going through our CPO process that requires:

  • Multi-point inspection process
  • Repairs as necessary
  • Update with a remanufactured longblock, as necessary
  • Dynamometer testing

Certified Pre-Owned units will show evidence of use: scratches, cosmetic corrosion and any number of original hours are possible. But in every case the engines are deemed fully functional.

Plus Series engines are upgrades to a Certified Pre-Owned MerCruiser that receive a remanufactured longblock that has value performance in mind.

6)  Outboard Engine Shaft Length

To find the correct outboard engine shaft length you need for your boat.

  • Single engine: Measure vertically down from top of transom mounting location of the engine to the height of the lowest point of boat hull. Generally it will around 15″ short shaft / 20″ long shaft / 25″ extra long shaft or 30″ extra extra long shaft.



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