Feature 1Application: Ignition module is replacement for Mercruiser, Replacement for OMC 4cyl. V6 V8 engines with for Delco breakerless distributors. 2OE Number: 811637001, 811637T, 1851071, 3854003 are the reference part numbers. Please double check the part number of your item. 3Sturdy Metal Construction: Constructed of high hardness metal material, ignition unit is wear resistant, impact resistant, not easy to break. 4Original Standard: Ignition module unit is engineered to meet or exceed OEM specifications, dedicated to the special car model. 5Ideal Replacement: Professional manufacturing, high performance, strong reliability, perfect for your rebuild, repair, and maintenance needs.SpecificationItem Type:Ignition ModuleMaterial: MetalOE: 811637001, 811637T, 18-5107-1, 3854003Fitment: Replacement for Mercruiser, Replacement for OMC 4-cyl. V6 V8 engines with for Delco breakerless distributors. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Ignition ModuleNote1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!