Briggs Vanguard 14/16HP & 18/20HP Engine Upgrades and Identification

[liflod]

Also need to mention that a timing advance key is worth some more power. Jersey Bigfoot claims to help a lot. I have not done mine yet, but its on the list of things to try for cheap power.

[Nubs]

I like to use these adapters from Al with those intakes, lets you bolt on a lot of different carbs if one would decide to run more compression, cams etc.

[suita]

Your offer is valid? you can send in Russia?

[Nubs]

Just thought I would show the difference between heads, cheap way to add compression/hp to the 16, 18 and 20's. the left is the 12/14hp the middle is the 16 and right is the 18/20. you can see the difference in the chambers which will add compression, all fit each other and use the same valves, port size N valvetrain. the steel heads gaskets help also. these heads can also be installed on the 23hp but you need to switch to the 20hp intake and change the exhaust flanges and add the hi torque starter. carb jetting and or replacement will need to be made and is better suited for the guys that don't run the governor.

[Nubs]

Graphite


steel

[PlumCrazy]

Great post Nubs, thanks for the clear concise info.
The pictures make the info very clear.

[Nubs]

Thanks plumcrazy.

just a few notes that i use if i don't have any numbers to work with, should cover 99% of what ya need.



this link will let ya plug in your model # and the whole parts break down is all there.

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14HP 480cc 2.70 bore 2.60 stroke

294447-0445-01

Heads

#1 / 809200

#2 / 809201

Head gaskets

806085s graphoil

807986 Steel

gasket set

808704

------------------------------------------

16HP 479cc 2.68 bore 2.60 stroke

305447-3075-g1

heads

#1 / 809200 (some times)

#2 / 845716

head gaskets

806085s graphoil

807986 Steel

gasket set

808704

---------------------

18HP/20HP 570cc 2.97 bore 2.76 stroke

356447-0213-b1 except the two barrel intake/carb

heads

#1 / 809185

#2 / 809186

head gaskets

690888 graphoil

805653S steel

gasket set

841188

---------------------

23HP 627cc 2.97 bore 2.76 stroke

386447-0079-g1

heads

#1 / 845713

#2 / 845714

head gaskets

842622

gasket set
842658
-----------------
Please always double check the #'s as this is just my guide

[fmints]

Nubs your are sooooooo correct!! You are the Man!!!

[Nubs]

Looks like Al shortened up the two barrel adapter N turned the flange horizontal, the top of that 36mm is only 3.5" above the rocker covers.

[Nubs]

Not sure this belongs here. this is what happens when a guy lets a welding BB er' 2 pop into the intake of a race motor. Sure glad It wasn't me