Retrol HM-01 Hit & Miss engine. In 2023 I pre-ordered a Retrol HM-01 hit and miss engine from Enginediy which I knew would take a couple of months for delivery because it was still in pre production. I was happy to wait and I was kept informed of progress and expected delivery. It duly arrived very well packed and beautifully made. This was my first attempt at building an engine but it went together perfectly. The instructions were mainly pictorial and a little more written description would have helped but all my questions were promptly answered by their excellent service department. I have been running this engine for four months now and I’m delighted with the design and quality. I would certainly recommend Enginediy and will be using them again.

Toyan V800 base Toyan V800 base Built the base with the additional parts of 3 ea, motor starter modules to make switching loads for a start enable (whole unit power), glow plug power(power to the 2 plug units), and the motor starter (self explanatory). I also added a second start button switch for safety to help prevent a stuck starter button sw from burning up the starter motor. So functionally. You have to press both start switches to crank the motor. I soldered all connections and used heat shrink to insulate the connections. All the electrics are installed inside the base. I did relocate the mounting of the motor to my preference. I’m still waiting on a replacement black fuel tank, or the glass for one end of my tank as it came with a cracked glass on one end.

Happy customer!! I ordered a little air cooled petrol hit and miss Oddball engine. Received my order very soon end very well packed. The M96 Mini Horizontal Air-Cooled Single-Cylinder 4-Stroke Oddball Hit and Miss Gas Engine runs very good right out of the box. I’m a very happy customer!

Fantastic Fantastic! This is the 4th project I've purchased from EngineDIY and I have enjoyed each and everyone. The Rotary 5 Cylinder, the Fighter Jet Engine, the V8 Flat Plane Crankshaft Engine and now the Turbofan Jet Engine. This particular model project is made from all metal parts with precision fitment and provides 20+ hours of assembly enjoyment. All of these projects are in lighted displays in my home and are enjoyed by friends and family. Especially noteworthy is all these models "run" by rechargable battery. Watching pistons, gears, propellers and machine parts move is awesome! I've been purchasing from this outfit for 4 years and look forward to future kits.

Great and Respectful Service I like EngineDIY because they always do what they say they will do. If you have any problems assembling one of their excellent kits, an email to enginediy.com will get you a quick reply. I recently purchased a very new model. Understandably, there have been a couple of production bugs, causing me to email EngineDIY to ask for replacement parts. They were sent to me without complaint as soon as they could source them. You are safe with EngineDIY. Recommended!