Engine Serial Number: 4172389
ROTAX 582 UL Mod 90 (Grey Head) *Please note that the information you received about your engine being a ROTAX 582 UL Mod 99 is incorrect*
Manufacturing Date: 15.12.1993
TBO: 300 hours or 5 years (whichever comes first)
Your engine is a Mod 90 (grey head), produced until 1999. After 1999, Rotax upgraded the cooling system and introduced the 582 Mod 99 (blue head). Given the 5-year TBO, your engine should have undergone at least six overhauls since it was manufactured.
We strongly recommend sending your engine to an authorized Rotax Service Center for a proper overhaul, which includes replacing the crankshaft with a genuine Rotax 582 crankshaft. If a mechanic claims to be a "Rotax expert" but does not replace the crankshaft, you are not getting a true overhaul. It’s crucial to be cautious about where you send your engine.
To ensure quality service, here is a list of recognized Rotax facilities where you can arrange a complete and authentic overhaul. https://dealerlocator.flyrotax.com