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Briggs horizontal twin, Vanguard or L-head?


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#1 Oldford OFFLINE  

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Posted June 27, 2017 - 01:46 PM

If you had the choice of 2 identical tractors, each has around 1000 hours on it.  Tractor to be used year round, plowing, mowing, etc.

 

One is 25 years old with a Briggs Vanguard 16hp, the other is 30 years old with a 16hp Briggs flathead twin.  Both tractors are in the same decent shape for the year, same level of maintenance, same price range.

 

Which engine would you expect to last longer going forward, no stuck valves, pulled out seats, spun bearings, etc.

 

Which engine would require less fiddling with down the road. How often do you have to adjust valves on a vanguard, do pushrods or rocker arms go bad?

 

Any experience, opinions, etc welcome



#2 dtsh OFFLINE  

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Posted June 27, 2017 - 03:10 PM

It is my understanding that OHV will have a lower fuel consumption per unit of work than an L-head due to design; that may or may not matter to you.


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#3 Tecumseh power ONLINE  

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Posted June 27, 2017 - 03:28 PM

16 opposed twin
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#4 dodge trucker ONLINE  

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Posted June 27, 2017 - 05:51 PM

yup opposed. BUT  among each engine family there are differences. If one is an I/C version it may have better bearings and stellite valves for instance. 2 seemingly identical engines can be vastly different.

plain bearings or bronze sleeves or even ball bearings but identical outward appearance

Cast iron sleeved or straight aluminum bore?


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#5 Oldford OFFLINE  

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Posted June 27, 2017 - 07:02 PM

Thanks for the tips.  Fuel usage isn't an issue, i have a briggs 16 flat right now and it doesn't use a lot of fuel for what i do.

 

How can i tell the difference between the different flathead models?  Pretty sure my current one says I/C on the air cleaner tin, but it was changed out at some point or so i was told.

 

The 16's i have seen all say Model 402437 throughout the 80s, does this mean anything as far as bearings vs bushings, etc?



#6 dodge trucker ONLINE  

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Posted June 27, 2017 - 09:27 PM

look in the Briggs manual, the model number is broken down inside the front cover or within the 1st 2-3 pages, will tell you what you need to know. the type number  tells what company ordered that engine, crank length/diameter, carb/governor linkage configuration etc... this number isn't broken down so much anywhere that I have seen but is referenced in the parts breakdowns,

where certain parts fit this type number and not that one.


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#7 Oldford OFFLINE  

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Posted June 28, 2017 - 10:58 AM

How many hours do these engines go before needing a rebuild?



#8 dodge trucker ONLINE  

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Posted June 28, 2017 - 11:27 AM

Depends alot on how much maintenance it has had.
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#9 Oldford OFFLINE  

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Posted July 01, 2017 - 05:45 AM

I am wondering is there a ballpark lifespan for these engines.

 

Like, it is not uncommon for a well-maintained onan to last for 2000 hours.

 

Wondering if there is any benchmark for the briggs twins??



#10 dodge trucker ONLINE  

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Posted July 01, 2017 - 07:36 AM

dunno as for some reason I don't see many Briggs opposed twin engines equipped machines with hour meters for some reason?






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