Sea Ray

Hey Wingless, yes, I get how to match the RPM'S thru the gauges, but the throttles do not line up even now. I have talked to several prop companies that believe it is due to the pitch being not right. Do you have any ideas? Thanks - Paul

Have the props been tuned?

What do the results show?

Mine are tuned every few years and are always identical.

My throttle levers during operation are always virtually aligned.

As far as tuning them I am not sure but they are brand new, a matched pair except for the pitch. The throttles were fine until the props were replaced with a different pitch to starboard

When I examine the part manual for a 2000 340DA w/ 454 MAG MPI Horizon vee drive engines the spec is 17"x17"x1.5" RH/LH, 17"x16"x1.5" for the standard 7.4L

Stern drive gets 15.5"x17" props.

No where did I find 18"x21" props listed for a 340DA.

Regardless, even w/ new props, a good starting point is to have them tuned / balanced. It should improve the operation and top end. In my case the first time bringing to the highest tune, Class S was the most painful. Periodic tweaks were acceptable cost.

Also, the symptom about throttle position changing w/ new props, also having a specified pitch difference (even though small) points to that being the first thing to check.