Update* had the injector pump rebuilt the guy said it wasnt too bad but he ended up replacing 2 plunger thingys and adding one shim under the roller to get the timing right, cost around 520$ after that it seemed alot better no more cylinder pumping air sound, but still loosing power after sometime....
Then I ended up taking the injectors in the cleaned them up and replaced the tips it ran solid but I started getting temperature light and coolant boiling over through vent tube, I ended up changing oil and I might have had too much oil, I lost my dipstick first year I had it but I cant keep track of oil ended up getting 6 or 7 quarts out of oil pan, I put 4.5 back in still getting overheat issue, but it was 95 degrees out and I was running for about 30 to 40 mins 2200 rpms nonstop with brushhog in tall grass..
I guess next plan of attack is to wait for proper dipstick to come in(currently I have universal dipstick that I cut to aproximate length but it could be off 1 or 2 quarts, also the radiator has bunch of grass in it even behind the cleaning screen about 20% of it, not sure how much difference that will make when I clean it, air filter could use replacement aswell ...
I am not sure ir headgasket is blown but it wasnt loosing any coolant before I redid injector pump it would drip a little bit out of overflow, I checked the coolant it looks normal green orange looking, pretty close to coolant bottle color that I add, did the glove over radiator test its not inflating when I ran the engine,