Qsc 500

[bluefin650]

Looking for opinions on the QSC 500 with a Twin Disc 5065SC. Didn't find anything by searching. Is the reverse gear a good match? Is the motor reliable/rugged? Are the cylinders sleeved? What's the good/bad and the ugly?

Thanks for any info

 

[BillD]

The QSC 500 is a very very good engine.
Commercial rating 2600 rpm.....1500 hrs. annual usage.


Prop it to 2650.
Run 80% load or less
Fabricate an exhaust for the engine/boat that will NEVER allow the trubo to "ingest water".
Maintain the salt water side of the cooling system.
Service and clean the aftercooler every four years regardless of hours used.
Change oil/filter (FleetGuard) every 150-200 hours.
Keep up with "marine age" of the engine hang ons.
Feed it 2 micron filtered ZERO water fuel.
Etc., etc.,
Engine should last ya many many 1000s of reliable trouble free hours.

Engine is sleeved.

I have no knowledge of the gear.

The engine IS sleeved.

 

[Nighthawk]

At 500 HP there isn't any engine better in my mind.

 

[bluefin650]

Thanks for the info. The main thing I was looking for about the gear is if it was the 2 disks with the rubber fused between them?

 

[Tuna Pursuit]

That is my dream engine for my DE I dream about building. I'm on my second boat with Cummins B series in it and they are great engines and the C is their bigger, tougher, stronger brother. Yes wet cylinders, key!

 

[BillD]

spec sheet

Thanks for the info. The main thing I was looking for about the gear is if it was the 2 disks with the rubber fused between them?

here ya go!

Twin Disc - MG-5065 SC

 

[bluefin650]

here ya go!

Twin Disc - MG-5065 SC

Thanks, I checked it out before. "Flexible Coupling" sounds like 2 steel plates with rubber fused to them to me??

 

[BillD]

Thanks, I checked it out before. "Flexible Coupling" sounds like 2 steel plates with rubber fused to them to me??

bluefin,

if the engine/trans package is in a boat you are considering and need "owner and expert" opinion on the transmission (or QSC 500)......

jump over to boatdieselforum.com and post the gear question and look over the hundreds of posts on the Cummins QSC family.

You'll get some quality answers.

FWIW

Bill D