I have a query about an issue i am having with a Ransomes T51D/951D Batwing Mower with a 51HP Kubota diesel engine.
The mower cuts grass fine on flat going or going down a hill but going up against a hill, the engine comes under heavy load and power drops until i stop and then the engine will regain power again.
New fuel filters (pre filter and main) were fitted, checked that diesel cap valve was clean, checked that there are no fuel leaks etc, cleaned out air filter. The mower starts very easily and engine runs smooth.
Bit of a head scratcher this one, so any suggestions welcome from anyone that might have experience with these mowers.

Thanks
Soulman