Sea Doo 787 Engine Rebuild

Premium Sea-Doo 787 Engine Rebuilding Service At Today We Wrench, we take immense pride in our craftsmanship. We don’t just fix engines—we deliver the most thorough, high-quality Sea-Doo 787 rebuild available on the market. We don't cut corners with cheap aftermarket replacements. Instead, we masterfully rebuild your original OEM core using premium components that outlast and outperform the competition. Here is our exact, step-by-step order of operations to bring your engine back to life: 1. Intake & Diagnostics Photo Documentation: Your engine is checked in and thoroughly photographed for transparency. Failure Analysis: During teardown, we inspect the wear patterns to diagnose exactly why your engine failed, helping you prevent it from happening again. 2. Precision Machining & Cleaning Cylinder Boring: Cylinders are precisely measured, bored, and chamfered specifically to match a brand-new set of WSM Platinum pistons. Ultrasonic Cleaning: Engine cases undergo a deep ultrasonic clean to remove all debris, oil, and scaling. Case Lapping: We lap the engine cases on our precision lapping table to ensure all mating surfaces are dead flat, preventing future leaks. 3. The Ultimate OEM Bottom-End Rebuild The Crankshaft: We completely disassemble, rebuild, and true your OEM crankshaft using premium Japanese bearings. Why this matters: This is not a lesser-quality aftermarket crankshaft. OEM steel is vastly superior, and aftermarket bearings don’t come close to the quality of the Japanese bearings we use. You simply cannot get a better crankshaft. Counterbalance Shaft: Rebuilt to the same rigorous standards using premium Japanese bearings and high-quality seals. New Components: We install a brand-new rotary welch plug and rotary shaft bearing, then inspect the rotary shaft for perfect trueness before installation. 4. Assembly & Multi-Stage Pressure Testing Sealant Cure Time: The bottom end is assembled with new seals. We allow the sealant a full 24 hours to achieve maximum hardness before testing. Rotary Seal Test: We pressure-test the rotary valve seals at 8 PSI per the factory manual—holding the test for an hour or longer to guarantee a perfect seal. Squish Clearance Setup: Once the bottom end passes, we assemble the top end and dial in the squish clearance to factory OEM specs (or tighter upon request). Final Full-Engine Pressure Test: With the engine fully assembled, we perform a final pressure test on the entire unit to ensure 100% seal integrity. 5. Delivery Secure Shipping: Your precision-rebuilt engine is meticulously packed and shipped right back to your door, ready for the water. Shipping is not included in this price. The customer is responsible for shipping to to and from us. This price does not include painting your engine or powder coating your engine. If you would like that done please send us an email to discuss pricing.