At idle, the 4JH3TE on my IP 420 (#79) revs at 1100 RPM. I note in the Yanmar service manual that slow idle should be at 700+/-25 RPM.
When I tried to slow the revs by adjusting the injector pump end of the throttle cable, the lowest I could get to was about 900 RPM, but even at that level it would not reliably idle or start.
My question: What are other IP420 owners seeing with their engines - similar to mine, or closer to the 700 RM level?
Neil
S/V Galatea