Diesel differences

California · Jan 15, 2020

nova3930 said:
... yanmar 4 cylinder diesel in it. 1989 model with who knows how many hours. Been rode hard and put up wet it's entire life. I haven't run it in a month and i know I can roll out there right now and have it fire right up on the first key turn. I would take a Yanmar over any other small diesel in existence.

Agree. I did that today. Mid 40's weather, colder in the barn. I started the little guy - Yanmar YM186D, three cylinder, early 1980's - when it it hadn't been started for a month. I should have charged the battery first, it cranked unusually slow. But it fired after a couple of TDC's and immediately was as smooth as if it had been 5 minutes since it last ran.

The 70's design YM240 starts as readily but that 2-cylinder thumper is painful to listen to cold or warm, 'the sound of raw power!'

In 2005 I posted on here a small vid with sound illustrating this. It starts as readily today, now 40 years old. Here's the post if anyone wanys to hear an Old School Yanmar.

Sound file posted - cold start and Yanmar Hammer

Gcorron · Jan 16, 2020

My 97 5.9 Cummins is consistent at 18-19. If I get it on the open highway, and set the cruise control, it will hit 22-24 consistently. Every time I pull into a 7-11, or somewhere, there's nearly always someone offering me money for it. Not for sale!!

George

Molalla1 · Jan 16, 2020

Gcorron said:
My 97 5.9 Cummins is consistent at 18-19. If I get it on the open highway, and set the cruise control, it will hit 22-24 consistently. Every time I pull into a 7-11, or somewhere, there's nearly always someone offering me money for it. Not for sale!!

George

Ya I have a '92 2500 and a '06 3500 that are not going anywhere.

Topzide · Jan 16, 2020

I've got an 2014 3500HD Ram. Got the Cummins 6.7 with 4.10 gears, dually 4x4. I get 17 - 18 on summer fuel running county roads with 22+ on highway. Winter fuel has cost me about 1 - 2 mpg on either. I'm 3rd owner with 140k+. Engine is smooth even with cold (below 32) start. Love the power I've got. Runs best on highway @2000 / 70mph! JM2C

Molalla1 · Jan 16, 2020

Topzide said:
I've got an 2014 3500HD Ram. Got the Cummins 6.7 with 4.10 gears, dually 4x4. I get 17 - 18 on summer fuel running county roads with 22+ on highway. Winter fuel has cost me about 1 - 2 mpg on either. I'm 3rd owner with 140k+. Engine is smooth even with cold (below 32) start. Love the power I've got. Runs best on highway @2000 / 70mph! JM2C

2,000 RPM's at 70 with 4.10 gearing? You must run bigger tires?

Topzide · Jan 16, 2020

Stock tires. That's the sweet spot on this truck.

Molalla1 · Jan 16, 2020

Topzide said:
Stock tires. That's the sweet spot on this truck.

OK, ya, I guess my 3500 with 3.56 gearing runs about 1900 rpm's at 70.

dodge man · Jan 16, 2020

I've owned a Kubota BX 0.9 liters, and currently own a JD 2025R with a 1.3 liter Yanmar. The Yanmar smokes like a son of a gun on start up and runs rough, but after just a few seconds it smooth. Idles very high, almost 1500 rpms. The Kubota idled at something like 1250 rpms, still pretty high. For being smaller the Kubota made pretty good power and used less fuel then the Yanmar but wasn't as smooth and quiet.

I owned a 2004 Ram with a Cummins (no "G" in that word) and had 4.10 gears. I'm guessing the newer trucks have a little deeper overdrive because mine was humming down the road at 70 mph but I don't remember the exact RPM's. I never saw 20 mpg with that truck but towing didn't seem to lower the mpg by very much.

Topzide · Jan 16, 2020

I've also got a couple Iseki's with 3cly Mitsubishi's in them and the run smooth through the power range. Only little smoke when working hard with Gov kicking in. Not sure on age but hours are just over 1k on the 15hp and just under 700 on the 17hp. Block heaters make the real cold starting a breeze! Old school without any computers!