Mercruiser exhaust riser 15-degree 3" 1981-2002

4.3, 5.0, 5.7 Liter GM 15 degree elbows for V6 / V8 manifold

Updated May 10 2026

GLM Marine elbows are an exact replacement for the stock manifolds
Backed by a 3 year warranty from GLM Marine.
Used with original exhaust manifold 99746 A17 or 860246 Q11
3 inch outlet length at 15 degrees – cast iron
Mercruiser exploded view risers click here
1983 – 2002 Model numbers 175 – 205 GM 229/262 CID V6
1983 – 2002 Model numbers 200 – 320 GM 305/350/377 CID V8 (small block)
1981 – 2002 Model numbers 330 – 370 GM 454/502 CID V8 (big block)

Mercruiser exhaust riser 15 degree 3" V6 - V8 1981 - 2002

51110 Mercruiser riser V6 - V8 OEM 98504 A3

P/N 51110

3 inch elbow-riser assembly

Replaces Mercury 98504 A3
Includes installation hardware and mounting gaskets.

Model, CID, Year and Serial number
for small block GM engines

185 229 V6 1985 – 1986
6330183 – 6919655 (4bbl)
185 262 V6 1985 – 1986 0A 331455 – 0B 527954 ( 2bbl )
205 262 V6 1985 – 1986 S/N 0A 331455 – 0B 527954
200 305 V8 1985 – 1987 S/N 6899058 – 0B 525981
228 305 V8 1983-1995 S/N 6218462 – 0F 600999
230 305 V8 1985-1987 S/N 6899269 – 0B 525981
898 305 V8 1983 – 1984 S/N 6218462 – 68990571
260 350 V8 1983 – 1987 S/N 6218462 – 0B 773304
260 350 V8 1981 – 1987 S/N 5907058 – 0F 024999

$147.95 US

$ 314.89 CDN

Included

P/N 51110 Cast iron elbow / 98504 A3
P/N 22391 Steel stud / 16 – 49545 x 4
P/N 30240 Riser gasket / 27 – 863724

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