We try to do all our service we been wrenching like slapper says. but we usually solve the problem. Preventive maintenance is the key,if you can try to stay with manufacture filter's there is a big difference,try one day after it has been used cut open a manufacture oil filter what a difference. On 2 stroke fuel filters I use only manufactur. I know $7 bucks for fuel filter for 2 stroke but it pays off.