9 uses -
Ends 11/30/2026
Enginediy offer: Build and enjoy the RETROL SE-03 stationary steam engine, featuring a boiler, generator, and lamp stand. This detailed working model is a rewarding project for collectors, hobbyists, and fans of classic engineering.
Save 10% on sitewide purchases at Enginediy during the New Year sale. Enter promo code 2026 at checkout.
Save $150 on RETROL and OKMO D-Type miniature gasoline engines.
Celebrate the season with Enginediy and save 12% sitewide with code BF12. Select model engines, DIY kits, and gifts are also up to 12% off, with discounts applied automatically where eligible.
Save 15% sitewide at ENGINEDIY with code BF15, plus get 15% off select items during the sale. Discounts apply through December 5; select-item savings apply automatically or as listed online. Cannot be combined with other coupon codes or special promotions.
Build a detailed 1/4-scale TECHING V12 engine model with 800+ pieces, synchronized throttle sounds, and hands-on mechanical assembly. Save $200: $899.99, regularly $1,099.99. Discount applies automatically at checkout. Early Bird offer valid November 27–December 15, 2025.
EngineDIY’s Black Friday sale runs November 14–December 1, 2025. Save 20% sitewide or get 20% off 20 select items, including engine models, kits, and accessories. Shop these limited-time holiday deals while they last.
Start Black Friday shopping early with 12% off regular-priced EngineDIY products, including engines, model kits, and accessories, from November 1–13, 2025. Items with a larger existing discount retain their current offer. Save on DIY builds and upgrades.
Save $100 on the RETROL & OKMO B01 miniature water-cooled, single-cylinder, four-stroke hit-and-miss gasoline engine model. Now $379.99.
The RETROL & OKMO Morse Z01 Throttling Governor features a durable, four-stroke, single-cylinder gasoline engine. Get it for $479.99 and save $100 during this limited-time offer.
Build the TECHING L4 four-cylinder engine model with this full-metal kit. Now $399.99, save 20% on this hands-on project for engine enthusiasts.
Got a coupon code for Enginediy?
Share it with the community and help others save.
The site features a variety of build‑your‑own engine kits and mechanical models, including gasoline engines, jet engines, V8 engine kits, steam engine assemblies, RC engine components, and accessories. These items appeal to hobbyists, engineering enthusiasts, and learners interested in hands‑on assembly projects.
Verified promo codes and discount codes have been circulated online for Enginediy purchases, such as percentage‑off codes that reduce the subtotal of qualifying items when applied at checkout. These codes change regularly and may vary by product and season.
When placing an order, buyers can enter a valid promo code in the designated discount box during the checkout process to apply savings before finalizing payment. Instructions on where to input the code are shown in the cart or order summary area.
Free shipping promotions have been reported for qualifying orders at times, allowing customers to receive items without additional delivery cost when specific conditions are met. Availability depends on current deals and terms.
Historical promotions have included seasonal events such as spring sales, Independence Day promotions, New Year deals, and holiday‑themed discounts where engines and model kits were featured. Only the occurrence of these events has been tracked.
Enginediy sometimes encourages engagement with its social media channels or participation in tasks like surveys to receive supplementary discount codes or special offers, based on promotional campaigns.
Digital gift cards are offered in various amounts, allowing recipients to redeem the value toward future orders on Enginediy. These never expire and can be stacked with eligible discounts.
Sign up for PriceReduc newsletter alerts to be notified about new Enginediy deals, verified coupon codes, and timely savings opportunities as they become available.
Up to $100 OffBest Discount in $
$100 Off
Deals
1
Total Offers
1
Enginediy.com is an online retailer that specializes in offering a broad range of mechanical and engine model kits, hobbyist projects, and related accessories to customers around the world. Founded in 2009, it has evolved into an international e‑commerce destination for DIY engine models, STEM hobby kits, and educational building sets, with a focus on quality products and customer support.
Share these offers