update:
on my last offroading session with 4x4Engaged? i found DeeMog was not performing at her best. i thought it might be the nozzles or fuel pump that is not working well. today my machenic came and did the trouble shooting and found fuel filter cup rubber seals were taking air. upon further check up we found them in bad condition.
I rush for the these seals and found the atlernative tractor fuel filter seal rings that fits perfectly in mog filters.
again we start fitting the filters and get the airlocking bleeded.... surprisingly we found that EFP not sending the fuel with pressure. than we check the primary fuel filter near fuel tank that was dead chock.
Conclusion: it was the EFP (EFP my new alteration replacing the lifty pump) that keep the mog running with airlock otherwise the towing of mog was must thing if it would have been an old lifty pump.
i have to replace the lifty pump because i have to get the boaster for servo brakes. it was planned that lifty pump will be replaced by merc 300D boaster attach to the same place where i got lifty fitted. lifty and boaster are replaceable among most of the merc engines.
Mashallah now DeeMog is doing good. half self start 
Tomorrow the gear box boot and navigator recaro will be fitted and mounted....
Testing and upgradation continues......