[james]

I would be concerned running the engine under a load really low on SCA’s. Low on SCA’s means little or no “protection against cavitation damage to both cylinder liners and water pump”.

Maybe, as a stop gap, until the coolant can be properly serviced, purchase some concentrated Supplemental Cooling Additive (SCA) appropriate and compatible with your existing coolant and some coolant test strips and add SCA additive until the SCA’s are up to the proper level.

Freeze protection would be lacking but at least the engine would be protected from cavitation damage.

Just a thought.

There may be a better plan…but we’ll have to wait for others to chime in.