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.

Just go ahead and pull the trigger! The ordering process was easy, tracking info was timely, and engine was packed carefully. I incorrectly thought a component was missing and contacted customer service. They quickly responded with directions to find the part in my kit. i am so happy with Engine DIY tgat I bought ANOTHER product from them!

Purchase of the year - very satisfied :) On 26 Dec 2023 I ordered Stirling Engine Model with Electricity Generator and Bluetooth Singing Tesla Coil in beautiful blue color. After 12 days, I recieve good protected package, with no damage, delivered direct to Switzerland. Perfect toy, no only for kids but also for engineers, like me :) , works perfect as described. Highly reccomended, I will definitely come back. Thanks :)

They don’t respond to emails regarding… They don’t respond to emails regarding their product once they have your money. I purchased 2 engines from them and they both don’t work. Don’t waste your money here

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.