I’ve never started any engine with the throttle set at 1200/1500. I’ll start it set at idle, then run it up to 1200/1500 to warm up. If that’s what kioti wants then why don’t they just set 1200 as the idle rpm?
I’m going to assume that is the 4 cyl diesel engine. Those old Ford 3 & 4 cyl engines were bullet proof in my opinion. But, they are sleeveless engines.
If you have a cyl pit thru, you have the choice of going to a machine shop or a crate replacement engine. We used to op for the crate engine...