How to read a Suzuki model designation
The ID plate on the clamp bracket shows the model designation on top, such as DF50TLX [1]:
- DT or DF: 2-stroke or 4-stroke.
- The number: horsepower.
- Feature letters: T = trim and tilt, R = remote, M = manual start, E = electric start, and others.
- Shaft length: S = 15″, L = 20″, X = 25″, XX = 30″ (sometimes followed by G or Z for counter-rotation).
- Last letter (1977–2000) or K + digit (2001–2010): the model year.
DT 40 C R S N → 2-stroke, 40 HP, oil injection, remote, 15″ shaft, N = 1992
Year letters, 1977–2000
For 1982–1988 Suzuki’s year codes have two letters (VZ, QD, VE…), but the first letter is left out of the model designation [1]. That makes D, F, G and J each stand for two years.
| Last letter | Model year | Suzuki’s full code |
|---|---|---|
C | 1977 | C |
D | 1978 | D |
F | 1979 | F |
G | 1980 | G |
J | 1981 | J |
Z | 1982 | VZ |
D | 1983 | QD |
E | 1984 | VE |
F | 1985 | VF |
G | 1986 | VG |
H | 1987 | VH |
J | 1988 | VJ |
K | 1989 | K |
L | 1990 | L |
M | 1991 | M |
N | 1992 | N |
P | 1993 | P |
R | 1994 | R |
S | 1995 | S |
T | 1996 | T |
V | 1997 | V |
W | 1998 | W |
X | 1999 | X |
Y | 2000 | Y |
K codes, 2001–2010
K1 | K2 | K3 | K4 | K5 | K6 | K7 | K8 | K9 | L0 |
|---|---|---|---|---|---|---|---|---|---|
| 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
K1–K9 come from Suzuki’s bulletin [1]; L0 = 2010 from two parts sellers [3][4]. Suzuki dropped the year code after that, so a newer designation such as DF140ATL ends with the shaft length [3].
The serial number: first digit = last digit of the year
The plate’s serial has a 5-digit prefix (the model) and 6 digits. From 1980 the first of the 6 digits is the last digit of the model year [1]. A dealer’s DF140 table shows the same pattern through 2025, for example 2014 serials starting 41… and 2020 serials starting 04… [5]. Before 1980 that position held a letter: C = 1977, D = 1978, F = 1979 (Suzuki’s rule only).
One digit repeats every ten years, so the decoder lists every decade. Enter the model designation as well and it keeps only the years both agree on: DF140TLK4 with serial 14001F-421001 gives 2004. If the two disagree, it shows both and says so.
Worked examples
| Serial | Style | How it reads | Made | Example from |
|---|---|---|---|---|
DT40CRSN | Last letter of the model code (1977–2000) | N = year letter (1992)Marine Parts Source’s example. | 1992 | Marine Parts Source |
DF15MSV | Last letter of the model code (1977–2000) | V = year letter (1997) | 1997 | Suzuki |
DF9.9ELX | Last letter of the model code (1977–2000) | X = year letter (1999) | 1999 | Suzuki |
DF25QRLY | Last letter of the model code (1977–2000) | Y = year letter (2000) | 2000 | Suzuki |
DT75TCLD | Last letter of the model code (1977–2000) | D = year letter (1978 or 1983)Constructed: D is 1978, or 1983 (code QD with the Q dropped). | 1978 or 1983 | Constructed to show the rule |
DF15MSK1 | K + digit at the end of the model code (2001–2010) | K1 = year code (2001) | 2001 | Suzuki |
DF4MSK3 | K + digit at the end of the model code (2001–2010) | K3 = year code (2003) | 2003 | Suzuki |
DF140TLK4 | K + digit at the end of the model code (2001–2010) | K4 = year code (2004) | 2004 | Browns Point Marine |
DF90TLL0 | K + digit at the end of the model code (2001–2010) | L0 = year code (2010)Constructed: L0 = 2010. | 2010 | Constructed to show the rule |
14003F-410001 | First digit of the 6-digit serial (1980 on) | 4 = last digit of the year (1984, 1994, 2004, 2014 or 2024)Browns Point lists 14003F-410001 as the first 2014 DF140A serial; the digit alone allows every year ending in 4. | 1984, 1994, 2004, 2014 or 2024 | Browns Point Marine |
01502-751338 | First digit of the 6-digit serial (1980 on) | 7 = last digit of the year (1987, 1997, 2007 or 2017)The ID plate shown in Suzuki’s bulletin. | 1987, 1997, 2007 or 2017 | Suzuki |
C12345 | Serial starting with C, D or F (1977–1979) | C = year letter (1977)Constructed to show the rule. | 1977 | Constructed to show the rule |
Where sources disagree
- One parts catalog lists 2010 DF140s as “K10”; two other guides give L0 for 2010. Both mean 2010, but only L0 is decoded.
- L1 (2011) appears in one guide only, so it isn’t decoded; use the serial.
- One guide shows 1989 as “VK”; Suzuki’s bulletin has K. The model designation ends in K either way.
What this page doesn’t decode
- Model codes from about 2011 on (e.g. DF140ATL): Suzuki dropped the year code; the last letters are shaft length and options (Marine Parts Source). Use the serial.
- L1 (2011) and K10 (2010): Each appears in only one source.
- 1975–1976 codes A and B: Only one source (Southcentral Outboards).
Common questions
How do I tell what year my Suzuki outboard is?
Read the last letter (or K + digit) of the model designation on the plate, then check it against the first digit of the serial. Together they usually give one year.
Where is the serial number on a Suzuki outboard?
On the plate on the clamp bracket [1]. It is also stamped on the engine block [3].
My Suzuki model ends in L or X. Is that the year?
On a pre-2001 designation the last letter is the year (L = 1990, X = 1999). On models from about 2011 on it’s the shaft length. Add the serial: if the two don’t agree, the letter is a shaft length.
Not affiliated with Suzuki. The brand name is used only to say which numbers this decoder reads.
Sources
- Suzuki (Canada) service bulletin, copy on Yumpu uploaded by hullygully.com: Service Bulletin M09-03: Model & Model Year Identification, 1977–2009 model year outboards (2008-11-03)Used for: Last letter of the model code (1977–2000); K + digit at the end of the model code (2001–2010); First digit of the 6-digit serial (1980 on); Serial starting with C, D or F (1977–1979).
- Southcentral Outboards: Suzuki Model Year GuideUsed for: Last letter of the model code (1977–2000).
- Marine Parts Source: Identifying Suzuki Outboard Engines (2022-10-31)Used for: Last letter of the model code (1977–2000); K + digit at the end of the model code (2001–2010).
- Macomb Marine Parts: Suzuki Outboard Motor Serial Number Lookup: A Complete Guide (2026-03-09)Used for: Last letter of the model code (1977–2000); K + digit at the end of the model code (2001–2010).
- Browns Point Marine Service: Suzuki DF 140 model serial numbers (parts catalog lookup)Used for: K + digit at the end of the model code (2001–2010); First digit of the 6-digit serial (1980 on).