i have a 2015 mahindra 4550 4wd...it will start if you pump the plunger on the primer assembly...as soon as you stop pumping the primer though it dies...it will stay running but only if you continously pump the primer...any suggestions on what to look for to solve this....this tractor has about 80 hrs service...mahindra dealer did the 50 hr maintainence when due.so everything is still fairly new...i don't see any leaks in the fuel system and the fuel was conditioned with a stabilizer over the winter months.....thanks to all who reply..................rick