燃油泵装配里有几段橡胶，根据Rotax手册规定橡胶产品5年需要更换
Time limit
The following components and systems must be replaced every 5 years:
*All rubber hoses of the cooling system (except GENUINE ROTAX@ silicon hoses),which need to be checked by"on-condition" maintenance according to the instructionsof continued airworthiness.
All rubber hoses of the fuel system
* All rubber hoses of the lubrication system which are part of the engine supply volumeand if they are not in the maintenance schedule of aircraft manufacturer
Connecting hose of the air intake system
.v-belt