For some of our engine repowering kits, we offer a choice of engines with different specifications and brands that we can supply with the kit. In this case, to help you make your choice, we display various relevant information in a comparison table located at the bottom of the page. Below, we provide more details on this information:
Model
The proposed engine model, as well as its power expressed in horsepower.
Price
The price of the product includes VAT. For all products over €150, shipping costs are included in mainland France.
Tree diameter
This refers to the diameter of the motor's output shaft, in millimeters, where the motor pulley is mounted. To check this, you often need to remove the pulley, and we recommend measuring it with calipers.
There are several possible scenarios for this tree:
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On some machines, the original motors always had the same shaft diameter, and this is still a common size today. In this case, we only offer motors with the correct shaft size. Your pulley will therefore fit without modification.
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Sometimes, the old engine had a shaft size that is no longer available. In this case, we offer to bore your pulley, included in the price, if you send it to us with your order. If this isn't possible, we'll provide a new pulley in the kit. In either case, this will be indicated in the product description.
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Finally, some machines had motors with different shaft diameters depending on the year of manufacture and the exact version. In this case, we recommend measuring the shaft diameter of your old motor. Generally, we offer motors with the various available diameters, and if we don't have a specific size, we indicate "Pulley reboring if necessary" in the description and include the reboring in the price.
Engine displacement
Engine displacement. This varies similarly to power, but it's sometimes preferable for comparisons between different brands. Generally, the engines we offer are equivalent to or slightly more powerful than the original engine.
Type of discount
Many motors have an internal reduction gear that lowers the output shaft's rotational speed. This allows for increased torque, for example, when using a plow or a cement mixer. If your old motor had a reduction gear, you will generally need to replace it with a motor that also has a reduction gear to ensure it runs at the same speed.
Q. How can I tell if there is a reduction gear on my motor?
Here are several methods to determine it:
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Output shaft alignment: if, viewed from above, the output shaft is perfectly aligned with the starter at the other end of the engine (the crankshaft passes completely through it), there is generally no reduction gear. Conversely, if the output shaft is offset from the starter, there is probably a reduction gear between the two.
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Testing the rotational movement: rotate the starter by hand one full turn and observe the output shaft from the other side. If it completes a full turn, then there is no reduction gear.
If you're unsure, feel free to send us a photo of your engine. Our team will help you easily identify whether or not it has a reduction gear.
Several scenarios can be distinguished:
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Non-reduction geared motors, also called "standard" motors: these motors have no reduction gear. For modern motors, they rotate at approximately 3,600 rpm at full speed.
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Modern 1/2 reduction engines: These engines have a 1/2 reduction via a chain. Inside the engine, the crankshaft drives a sprocket which drives a chain, which in turn drives a larger sprocket, thus reducing the rotational speed. They run at approximately 1,800 rpm at full throttle. This is standard for reduction engines today, but it's also one of the main reasons for modification, as chain reduction is bulkier than on older engines.
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Engines with a 1/2 reduction on the camshaft: this was the case for the majority of reduction engines manufactured before the last 30 years. Today, major manufacturers no longer produce them, and we only have a few engines that are still equipped with them (XRG type engines). On these engines, the crankshaft directly drives a camshaft to reduce the engine speed. As with modern reduction engines, this results in an output shaft that rotates at 1,800 rpm, but the advantage is that this reduction is less bulky: it is similar to that of a standard engine, but with the output shaft offset. The disadvantage is that these engines require a specific internal design, which increases the cost for the manufacturer, hence their disappearance from product lines. The few modern engines we offer that are equipped with this type of reduction can be very practical for replacement, as the shaft position will be closer to that of the original engine.
There are other types of reduction, but these are not applicable to this type of machine and are therefore not covered in this article.
oil level safety
An oil level safety feature is a sensor that grounds the engine to shut it down if the oil level is too low. On some machines, this can be a nuisance because when the engine is tilted, the safety feature can accidentally shut it down. That said, we prioritize engines equipped with this feature, because even though it's a nuisance, it can be deactivated in a few seconds.
Brand
The engine brand. We offer several brands across all price ranges. Often, the engines have the same specifications, and the main difference between the models offered is the brand.
Warranty (individual)
Warranty period for individual buyers. This warranty covers only design or manufacturing defects. Engines are covered by a minimum 2-year legal warranty, and some manufacturers also offer a manufacturer's warranty through their network, which may be longer. For more information, please consult our general terms and conditions of sale.
Manufacturing
We distinguish here:
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Original engines: in a specification proposed by the engine manufacturer, with only original parts.
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Hybrid engines: By "hybrid," we mean engines that we have modified to offer a specification unavailable from the manufacturer, or that is prohibitively expensive. This might involve, for example, changing the crankshaft to offer a specific shaft size, or adding a 1/2 reduction gear.
Feel free to contact us with any questions about a specific engine.