Engine hours??

[oc jeremy]

What is considered high engine hours?

 

[RT46]

It really depends on the engines, the boat, the maintenance, and the type and frequency of use....

 

[saltshaker]

Agree with above. 1000hrs can be high for some engines if run hard while others with 2500hrs may be considered low.

 

[geofish]

what type of boat and what engines?

 

[SeaEric]

Hours are way less meaningful now days. What most mechanical surveys look at is total number of gallons of fuel burned. This is what tells the story. The newer electronic engines store this data. 5000 running hours at 1200 RPM's probably = less fuel than 2000 hours running at 2350 RPM's.

 

[saltshaker]

It also matters what engine your referring to. A Detroit 16V92DDEC won't last nearly as long as a Cat 3412E in both hours and amount of fuel burned.

 

[Regal2800]

On the older diesels i constantly hear about the .7, .8, .9, 1.0 etc ratio of Horsepower to CuIn displacement with regards to lifespan on an engine which makes sense. how come this doesn't apply to the newer electronic diesels which pump out much more HP to cuin? I can understand how technology has increased efficiency and power but how is that making them last longer? Are the bearings, cylinders, piston rings, etc all built better as well?

 

[magnawake]

Yeah same goes with truck engines. The manufactors are getting tons of horse power out of these new diesel engines, but at what cost? Now they are spooling up many RPM's like thier gas cousins. I hear stories of blowing turbo's and stuff on new engines. Seems like common sense would prevail, the less RPM's, the less wear and tear. Thats why you hear about old tracter engines lasting forever. They just sit back and put along just above idle speed. I think how the engines were used might tell the tale. I'm sure a charter boat running hard out to the fishing ground would get less years than a Long Range trawler just putting down the ICW. I hear anything from 2500 hrs to 5000 hrs, but thats a big range I know. I have 1600 on my 3208 Cats and when we took the heads off last Aug, the engine looked practically new on the inside. I'm keeping my fingers crossed.

 

[34Hatt]

It really depends on the engines, the boat, the maintenance, and the type and frequency of use....

Let me just add one more Propping

I would want a motor propped to go 150 rpm over then one that's 150 under any day.

 

[ron6785]

The 6/71 & 8/71 naturals are bullet proof engines and probable good for 20 - 30,000 hours if not abused or run at high Rpms. 8/92's turbo's not so much, because they are generally used in higher performance applications and run at high RPM's.

 

[SKYCHENEY]

The 6/71 & 8/71 naturals are bullet proof engines and probable good for 20 - 30,000 hours if not abused or run at high Rpms. 8/92's turbo's not so much, because they are generally used in higher performance applications and run at high RPM's.

I agree to a point. The 92's at lower hp ratings were good too.