Balanced throttles on twin diesels

[QBhoy]

I don't think you guys are listening! I swapped the rev counters over and the readings are the same which proves without doubt that one engine achieves 200 RPM more than the other. I would welcome input from anyone who can answer the original question but this is drifting away into an argument about the accuracy of the rev counters which has been proven to be a non issue........
To be clear, both engines have adjustable throttle stops on idle and WOT. I was hoping someone would either say it is normal to adjust these so that both engines agree or conversely give me a reason why I shouldn't

To be fair. On analogue gauges..it’s not just the gauge itself that can cause inaccuracy..it’s the way they are fed too. My dash gauge is about 150 rpm astray from the actual ecu rpm true data.
I’d also say that on some counter rotating set ups..that have both engines rotating the same direction, but one has a counter rotation at the prop, this is done occasionally using an extra gear in the box. Can mean that at the least…one engine uses more fuel that the other.

 

[oldgit]

To be fair. On analogue gauges..it’s not just the gauge itself that can cause inaccuracy..it’s the way they are fed too. My dash gauge is about 150 rpm astray from the actual ecu rpm true data.
I’d also say that on some counter rotating set ups..that have both engines rotating the same direction, but one has a counter rotation at the prop, this is done occasionally using an extra gear in the box. Can mean that at the least…one engine uses more fuel that the other.

With an obsession on recording fuel consumption vs hours run over last four decades, with the twin engine boats, one engine always appeared to use less fuel that the other, not vast amounts just a few tens of litres between fill ups, even if you took eberspacher use into account.
This included 2 boats with outdrives (when they were not being repaired ) and 3 with shafts.
Out of interest recently spotted both tachos on the fly read around 100 rpm differently from those downstairs.

 

[harvey38]

At WOT, does the boat veer off to side of the engine with the lower RPM?

 

[Bilgediver]

If these engines have a regular mechanical governor on the fuel pump then why you do not just adjust the idle setting and max speed setti g on the speed lever of the governor which would give you what you are o
Looking for.