Sierra 18-1308 Rod Bearing, Standard Size, Replaces Mercury Marine 23-85701, Fits 7.4L 454 MIE Gen V/VI
Sierra 18-1308 Rod Bearing, Standard Size, Replaces Mercury Marine 23-85701, Fits 7.4L 454 MIE Gen V/VI
The Sierra 18-1308 is a standard-size connecting rod bearing engineered as a direct replacement for the original equipment bearing used in MerCruiser 7.4L MIE Gen V and Gen VI 454 cid V8 marine engines. Built from alloy steel, this bearing is manufactured to meet or exceed the quality of the original equipment part it replaces, giving rebuilders and engine shops a reliable option when servicing the bottom end of these V8 marine engines.
Each 18-1308 bearing is sized at standard (Std.) tolerance, which is the baseline fit specified before any machining oversize is required. It is compatible with oil lubrication and is supplied as a single rod bearing, making it easy to order the exact quantity needed for a full engine rebuild or a partial bearing replacement job. Because it is a precision wear component, using the correct part number and size is essential to maintaining proper bearing clearance and engine longevity.
Specifications
- Brand: Sierra
- Manufacturer Part Number: 18-1308
- Product Type: Rod Bearing
- Size: Standard (Std.)
- Material: Alloy Steel
- Item Dimensions: 0.39 x 0.39 x 0.39 inches
- Weight: 0.14 pounds
- Compatible Lubricant: Oil
- Engine Fitment: MerCruiser 7.4L MIE Gen V and Gen VI 454 cid V8
- OEM Cross Reference: 23-85701, 23-15961, 23-52221, 23-52270, F3910555, F3916351, FI1100305, FI1100570
Fitment
- MerCruiser 7.4L MIE GEN V, 454 cid, 8 cylinder, 4 stroke, 1992-1995
- MerCruiser 7.4L MIE GEN V, 454 cid, 8 cylinder, 4 stroke, 1992-1996
- MerCruiser 7.4L MIE GEN VI, 454 cid, 8 cylinder, 4 stroke, 1996-1997
Replaces (OEM)
- 23-85701
- 23-15961
- 23-52221
- 23-52270
- F3910555
- F3916351
- FI1100305
- FI1100570
Frequently Asked Questions
What engines does the Sierra 18-1308 rod bearing fit? The Sierra 18-1308 is designed for MerCruiser 7.4L MIE Gen V and Gen VI 454 cid V8 marine engines, covering 1992-1995, 1992-1996, and 1996-1997 production.
Is the 18-1308 a standard size or an oversize bearing? It is a standard (Std.) size rod bearing, meaning no machining oversize is required for installation.
Which OEM part numbers does the 18-1308 cross-reference to? The 18-1308 replaces OEM numbers 23-85701, 23-15961, 23-52221, 23-52270, F3910555, F3916351, FI1100305, and FI1100570.
What material is the 18-1308 rod bearing made from? This bearing is made from alloy steel, matching the material used in the original equipment rod bearing it replaces.
How many bearings come in one 18-1308 unit? Each 18-1308 is sold as a single rod bearing, so the quantity needed depends on how many bearings the engine rebuild requires.
What are the dimensions of the Sierra 18-1308? The 18-1308 measures 0.39 x 0.39 x 0.39 inches and weighs 0.14 pounds.
Does the 18-1308 meet original equipment quality standards? Yes, the Sierra 18-1308 rod bearing is manufactured to meet or exceed the quality of the original equipment part it replaces.
What lubricant should be used with the 18-1308 bearing? The 18-1308 rod bearing is designed for use with oil lubrication, as is standard for connecting rod bearings in these engines.
Can the 18-1308 be used for a full engine rebuild? Yes, the 18-1308 is part of a complete engine bearing lineup and can be ordered in the quantity needed for a full rod bearing replacement during an engine rebuild.
What is the difference between the 18-1308 and an oversize bearing like the 18-1309? The 18-1308 is the standard size bearing, while other part numbers in the same lineup are machined to specific oversizes for engines that have had their crankshaft journals reground; the correct size depends on the engine's current specification.