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Author Topic: diesel vs gas on a wood Mizer LT 15 wide  (Read 774 times)

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Offline WV TreeTopper

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diesel vs gas on a wood Mizer LT 15 wide
« on: February 05, 2020, 07:57:49 PM »
I just sold my Norwood LM29 and ordered a wood mizer lt15 wide. I was set on getting a Diesel engine on it , but when I told them the guy  he strongly suggested that I not get the 17 hp yanmar  diesel and go with the 25 hp Koehler . He claimed the diesel was to heavy and vibrated to much for a smaller sawmill. I went ahead and got the gas and saved 2000 bucks so I got the power feed instead. Still kinda wish I woulda gotten the diesel . Whatís the thoughts on this? I feel the diesel woulda been fine. 

Offline charles mann

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #1 on: February 05, 2020, 08:01:54 PM »
Following. I was wanting a diesel too, to go with the rest of my equipment. Iv even though bout sourcing a small diesel to replace the 30hp kohler in my welder just to keep my fuels all the same, except for my chainsaws and weed whacker
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Offline Mike W

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #2 on: February 05, 2020, 08:09:51 PM »
Can't speak to the diesel aside from the torque ratios of course, torque is king in wide cuts, I have an LT15 wide with the 25 hp gas, it has performed great, at least to my expectations, cuts true and nice flat boards, albeit the widest I have yet to cut was a 28" dia. Tamarak and aside from a little sap fighting, cut just great.

Offline WV TreeTopper

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #3 on: February 05, 2020, 08:10:45 PM »
Yes I agree! I have two diesel trucks,2  tractors, woodchipper and being that I use diesel to lube the blade on my sawmill I felt it would workout well with a Diesel engine on the sawmill but he shot my hopes and dreams down the drain lol

Offline WV TreeTopper

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #4 on: February 05, 2020, 08:14:09 PM »
Iím glad to hear your happy with the 25 hp Koehler mike w! Makes me feel better 

Offline Wattsranch4

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #5 on: February 05, 2020, 09:40:04 PM »
Had a diesel put on the one I ordered, will pick it up when I return from overseas. Guess we will have to see on the vibration but I everything else I own is diesel. No turning back now as it's sitting in Kirbyville waiting for me to pick up

Offline caveman

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #6 on: February 05, 2020, 09:51:09 PM »
We had a 25 hp Kohler on our lt 28 and it cut very well.  The engine started and ran every time we wanted to mill and never gave us a second of trouble.  It will provide adequate power to your mill to cut flat lumber.  We used 10į and 4į blades.  The 4's would saw flat in just about anything but may have dulled a little sooner than the 10's.  The power feed is a good option to have. 

Offline jeepcj779

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #7 on: February 05, 2020, 09:54:22 PM »
Since torque is king, and we all know it, I have to wonder why the manufacturers continue to publish HP instead of TQ as a measure of an engine's capability. I searched for a while to try and find the TQ values of the WM diesels compared to the gas engines, but I have been unable to locate them. 

Offline offrink

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #8 on: February 07, 2020, 09:23:54 AM »
I got the Koehler diesel on my LT15-wide and have never had issues with it lacking power cutting 35Ē-35 1/2Ē (canít really do 36Ē) wide oak. I use turbo 7ís and if I donít hit metal they go longer than I expected. I like the manual feed so I can feel what is going on in the log and can slow down or speed up when necessary. 

Offline richhiway

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #9 on: February 08, 2020, 04:43:53 PM »
I have the 26.5 gas on my LT 40 cuts just fine. Easy on gas. I think you would have to cut a lot for production for the diesel to pay for it self in fuel savings. Modern diesel engines are complicated and repairs and parts can be expensive. They are not the old reliable run forever mechanical engines of the old days. 

You have to take it easy cutting wide slabs in my experience. I don't think more power would help much. 
The power would come in when you could speed up production sawing cants into lumber.

The best power for mills and stationary equipment is electric. If your near a cord!
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Offline SawyerTed

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #10 on: February 08, 2020, 08:34:16 PM »
I agree with richhiway.  The gas engine is easily serviced and repaired by about any qualified small engine tech, if you can't do the repairs yourself.  I don't know if my local shop could repair the small Diesel engines like they do the gas engines.  The local shop stocks some parts and all filters for my Kohler 25 hp.
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Offline thecfarm

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #11 on: February 08, 2020, 09:44:31 PM »
I have a Honda motor on my sawmill. Bought back in '07. I've spent more on repairs parts than both on my diesel tractors. And the saw mill motor has way less than hours than even one tractor. 
Model 6020-20hp Manual Thomas bandsaw,TC40A 4wd 40 hp New Holland tractor, 450 Norse Winch, Heatmor 400 OWB,YCC 1978-79

Offline ladylake

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #12 on: February 09, 2020, 01:04:27 AM »
 A diesel uses about 1/2 the fuel of a similar hp gas motor plus more torque.  I have 10000 hours on my Isuzu and have saved around $14000 in fuel with at the most $300 in repairs for new glow plugs and a rear seal.  I've never had to add oil yet.   Steve
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Offline offrink

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Re: diesel vs gas on a wood Mizer LT 15 wide
« Reply #13 on: February 10, 2020, 09:19:47 AM »
In general the diesel, with proper service, will last much longer due the the reduced engine speed. Oil and filter life gets longer as well as the fuel. Untreated diesel lasts longer than gasoline and there is less of an issue with gumming up and ethanol issues. For me, I donít saw every week and sometimes not even every month, diesel just made more sense. 


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