After warm up it only makes about 8 lbs. @ 2,700 RPM
, at low idle I'll get the red light. It has run like this for over 20 yrs. It has 750 hrs. on it.
I have installed a new sending unit and gauge.
I have rigged up a mechanical gauge and it confirms low press.
In the manual it says low pressure is caused by worn out crank and or rocker shaft.( remember 750 hrs.) As long as I have been owner it has had regular service
. I use Dello 40 and a Fram filter. It was over heated once for a short time, but after I got that fixed the pressure was no worse for it. It didn't get that hot anyway.
There is a way to boost Press. It has a check ball and spring, you just add shims. I'm a little leary of this because it does make 40 lbs. @ cold start.
Things I think are the problem, out of specification clearance on the crank, rocker shaft, oil
pump. Thoughts are appreciated. Thanks.