how to decipher tecumseh engine numbers

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   "Tecumseh" engine code decipher list.

V = Vertical Shaft

LAV = Lightweight Aluminum Vertical {engine}

VM = Vertical Medium Frame {engine}

TVM = Tecumseh Vertical {medium frame}

VH = Vertical Heavy Duty {cast iron}

TVS = Tecumseh Vertical Shaft

TNT = Toro N' Tecumseh

ECV = Exclusive Craftsman Vertical

OVM = Overhead Valve vetical Medium Frame {engine}

H = Horizonal Shaft

HS = Horizonal Small Frame {engine}

HM = Horizonal Medium Frame {engine}

HHM = Horizonal Heavy Duty {cast iron} Medium Frame {engine}

HH = Horizonal Heavy Duty {cast iron}

ECH = Exclusive Craftsman Horizonal

An Example is: TVS90-43056A serial #8310C

TVS = Tecumseh Vertical Shaft

90 = 9 Cubic Inch Displacement

43056A = Specific number for parts identification

8310C = Serial number

8 = Year of manufacturing {1978}

310 = Calendar day of the year {310th day in year of 1978}

C = Assembly line and shift when the engine was built.

SBH = Short Block Horizonal

SBV = Short Block Vertical

OH = Overhead Valve Heavy Duty {cast iron}

Examples: OH160...OH120

Overhead Valve 160 equals 16 horsepower

Overhead Valve 120 equals 12 horsepower

Recommended oil viscosities for Aluminum Engines:

Above 32 degrees: 30 weight or 10W30 

Below 32 degrees: 5W30

Below 0 degrees: 5W30 or 10W

Recommended oil viscosities for Cast Iron Engines:

Above 32 degrees: 30

Below 32 degrees: 10W

Spark Plug Gap: .030 inch

Older model engines using points and condensers:

Ignition Point Gap: .020 inch

Valve Clearance: Refer to note below

============ ========= ========= ========= ========= ========= ========= ====

> > ========

>>>>>NOTE PLEASE READ<<<<

".005 int/.010 ex refers to OHV engines (OH and HH models), while .010/.020 refers to HH100 & HH120 L-Head models. What may be confusing is  that some of the older OHV models had an HH150, HH150 designation, and later become OH numbers."

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donp Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Master Regional Rider Joined: October/27/2003 Status: Offline Points: 8563	Post Options Post Reply Quote donp Thanks(0) Quote Reply Topic: how to decipher tecumseh engine numbers Posted: February/20/2007 at 6:26am
	"Tecumseh" engine code decipher list. V = Vertical Shaft LAV = Lightweight Aluminum Vertical {engine} VM = Vertical Medium Frame {engine} TVM = Tecumseh Vertical {medium frame} VH = Vertical Heavy Duty {cast iron} TVS = Tecumseh Vertical Shaft TNT = Toro N' Tecumseh ECV = Exclusive Craftsman Vertical OVM = Overhead Valve vetical Medium Frame {engine} H = Horizonal Shaft HS = Horizonal Small Frame {engine} HM = Horizonal Medium Frame {engine} HHM = Horizonal Heavy Duty {cast iron} Medium Frame {engine} HH = Horizonal Heavy Duty {cast iron} ECH = Exclusive Craftsman Horizonal An Example is: TVS90-43056A serial #8310C TVS = Tecumseh Vertical Shaft 90 = 9 Cubic Inch Displacement 43056A = Specific number for parts identification 8310C = Serial number 8 = Year of manufacturing {1978} 310 = Calendar day of the year {310th day in year of 1978} C = Assembly line and shift when the engine was built. SBH = Short Block Horizonal SBV = Short Block Vertical OH = Overhead Valve Heavy Duty {cast iron} Examples: OH160...OH120 Overhead Valve 160 equals 16 horsepower Overhead Valve 120 equals 12 horsepower Recommended oil viscosities for Aluminum Engines: Above 32 degrees: 30 weight or 10W30 Below 32 degrees: 5W30 Below 0 degrees: 5W30 or 10W Recommended oil viscosities for Cast Iron Engines: Above 32 degrees: 30 Below 32 degrees: 10W Spark Plug Gap: .030 inch Older model engines using points and condensers: Ignition Point Gap: .020 inch Valve Clearance: Refer to note below ============ ========= ========= ========= ========= ========= ========= ==== > > ======== >>>>>NOTE PLEASE READ<<<< ".005 int/.010 ex refers to OHV engines (OH and HH models), while .010/.020 refers to HH100 & HH120 L-Head models. What may be confusing is that some of the older OHV models had an HH150, HH150 designation, and later become OH numbers."

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