The max 50SX-H Hyper has established an enviable reputation for power, reliability and ease of use. The Max 55HZ Hyper moves that to a whole new level!
Designed primarily with the demands of the 3D pilot in mind, the 55HZ Hyper delivers 61 size performance in a 46 size crankcase. That power comes from the extensive experience that OS has gained over many years and working extensively with the worlds top pilots to refine all aspects of the engine without compromise in any area.
By using the same mounting layout, you can drop a 55HZ into any model that previously suited the 50SX-H without modification. Just the area around the new carburettor is a little bigger and may require adjustmenst to the cooling shroud.
This entirely new engine shares almost nothing with the 50SX-H and has some new features not seen on an engine of this size before. The rear bearing is now designed to resist corrosion, the new 40L carburettor has three adjustments to cater for idle, mid range and full power. Until now, these features were the domain of 61 class engines or bigger. The throttle arm has four leaves so that push pull control is easy from any direction. The heatsink head is bigger for improved cooling as well.
For the first time, OS is also offering a matching tuned muffler as an option part and has been optimised to extract the maximum performance from the 55HZ Hyper. Part number X-OS72144000.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Estimate shipping
Refund Policy
You have the right to cancel within 7 working days after the day you take receipt of goods. You must notify us within this time that you wish to cancel. You are required to take good care of the goods and return them to us at your own cost within 30 days. Your product must be complete, unused and in ‘as new’ condition (e.g. if you have opened the box to examine the product you must have done so without damaging or marking the product in any way). It should be returned with the original box, packing and accessories. If the returned item is in a condition which does not enable us to resell as new, we reserve the right to make a charge from any refund to cover this cost. We recommend that goods are returned by recorded or insured delivery. If you would like to phone our despatch department we can arrange to have the item(s) picked up. We will subtract the return cost from your refund. No refund will be provided for lost goods being returned to us, as this is the responsibility of the sender. We cannot cancel your purchase when: • The seal is broken on any software in the case of a simulator. Special Orders - If the goods were a special order that we do not have in stock and have had to order specially - If you cancel we reserve the right to charge a restocking fee of 10%. If we send a substitute without first checking that the substitute is acceptable then consumers are not expected to pay return carriage costs. These rights are in addition to those relating to faulty or misdescribed goods. If goods are returned as faulty, generally we will provide a replacement. If the item is of a ‘ready to go’ type model eg. Helicopter, plane, car etc. the item will be sent back to the supplier for a decision to be made in respect of a refund or replacement. Only then will a decision be made