Marine Engines FAQ

What is the difference between a used, rebuilt and remanufactured marine engine?

Used marine engines are pulled directly from a boat that is being salvaged for its components and parts or from one that is no longer serviceable and will likely not return to the water. Used marine engines may not be so much as surface cleaned. These engines are not disassembled, internally cleaned, or inspected. Used or junkyard engines may have high hours, a poor maintenance history and even unseen damage – a failure waiting to happen.

Rebuilding is to recondition by cleaning, inspecting and replacing the engine’s severely worn or broken parts. The engine’s serviceable parts are reused within the acceptable wear limits of the manufacturer. Rebuilt component quality can vary widely and many engines come with only a short term warranty.

A remanufactured engine is machined and assembled as closely as possible to the measured standards of the original equipment manufacturer. All core material like the head(s) and block castings, crankshaft, camshaft and rods, are carefully inspected, verified against original equipment measured specifications to assure correct dimensional tolerances and precisely machined. Replacement parts for a remanufactured engine are new or requalified to meet exacting standards and tolerances. Remanufactured engines are tested for adherence to the measured standards and tolerances of the original production engine.

What is the warranty on a JASPER remanufactured marine engine?

Complete engine applications for JASPER Remanufactured Marine Engines are the most popular application purchased from us and are covered by a 2 Year, Unlimited Hours Parts and Labor Nationwide Warranty. Short Block and Class II performance marine engines have separate warranty coverage. A full warranty disclosure is available on this website.

What is the difference between an automotive and a marine engine?

The duty cycles differs for automotive and marine engines. Marine engines run at a higher RPM for an extended period of time. Because of this, the valve train, including valves and springs, is different for a marine engine than for that of an engine used in an automotive application. Marine engines also use brass freeze plugs and head gaskets with stainless steel fire rings (unless unavailable for specific applications) to resist the effects of corrosion from the engine cooling system. Because boats operate on ever-changing water surface conditions, the oiling systems of their engines needs to be able to minimize the “sloshing” of the oil and a resulting irregular supply of oil at the pick-up tube in the oil pan. For this reason, marine engines use a more elaborate baffle system in the oil pan to keep oil levels more consistent in order to maintain a steady supply of oil to the various engine components.

How can I determine the rotation of my engine?

Most marine engines have a left hand flywheel or standard rotation. A reverse rotation, then, would be a right hand rotation of the flywheel. The industry standard for determining the direction of rotation is to view the flywheel’s rotation while standing behind the engine.

How can I find a price for one of your reman marine engines?

JASPER offers several options for you to obtain pricing on our remanufactured engines. We encourage you to speak with the marina or marine technician that services your boat to obtain pricing information. If you do not have a facility that you regularly work with, you can find a technician near you with our Installer Locator. JASPER also offers an online catalog with pricing information for most marine applications. We also have a friendly, courteous and knowledgeable Sales Department that will provide pricing and any additional information that you need. Our Sales Department can be reached at 800-827-7455.

Where can I purchase a JASPER remanufactured marine engine?

If you are a marina or marine service facility you can contact our Sales Department at 800-827-7455. Boat owners can purchase JASPER remanufactured engines from the marina or marine service dealer that you frequent. If you don’t have a marine facility that you work with on a regular basis, you can find a facility that installs JASPER remanufactured products near you with our Installer Locator.

Where can I find an installer of your products?

Our Installer Locator will assist you in finding a technician that installs our remanufactured marine engines - simply type in your Zip Code, email address and select the distance. Be sure to select the option of locating an installer for “Products Not Selected by Vehicle”.

Do you offer a reman marine engine for my boat?

Because JASPER remanufactures a variety of marine engines, chances are very good that we stock or can build a remanufactured engine for your application.

How soon can I get an engine for my boat?

We can generally have the engine at your installer’s location within a day or two. If we have to build your application, we can generally have it within a week. JASPER provides fast availability through 43 branch locations and two distribution centers throughout the country.

What is a core policy?

ALL JASPER REMANUFACTURED UNITS have a core and skid charge billed at the time of sale. When the core is returned, a JASPER Associate will determine the amount to be credited back to the customer’s account. The core returned must be a like-for-like Make, Model and Type, but not a junkyard core. Returned cores must be returned drained of all fluids and oil, assembled and attached to the same undamaged skid or container in which your remanufactured marine engine was shipped. The core must be returned within 30 days of the delivery date in order for you to receive credit. Full credit will be given unless certain damages and exceptions noted in our core policy are found.

What is the core policy on your engines?

The core policy on our remanufactured marine engines varies according to several parameters. It is best to speak to one of our sales representatives to receive information as it relates to your specific engine application.

Do you charge freight?

Most of our engines ship freight free, via our over-the-road fleet, to one of our 43 branch locations and are then delivered to one of our installers in your area. There are times when freight charges may apply. Your service technician or one of our Sales Representatives will be happy to provide specific information. Please call 800-827-7455 if you do not have a marine service technician with whom you currently work.