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The serial number 9137327 for a 20 HP Mercury Outboard is not not listed in the Mercury Marine parts catalog.
Hello.... it appears your outboard is a 1978.
I contacted Mercury Marine outboard division and they answered within a week. Very good response.
Home Depot has a variety of items to choose from to accommodate your needs. The site will allow you to observe and select a particular motor manufactured by Mercury Marine.
To find the year model of a Mercury outboard, you need to know two things, the serial number, and the horsepower rating. HomeContactShipping/ReturnsCartOrder by phone (800) 209-9624 Monday - Friday 8:30 AM - 5:30 PM EST Boat Engine PartsOutboard Motor PartsEvinrude outboard partsJohnson outboard partsMercury outboard partsMariner outboard partsForce outboard partsChrysler outboard partsYamaha outboard partsHonda outboard partsSuzuki outboard partsNissan outboard partsTohatsu outboard parts Inboard & Sterndrive Engine PartsMercruiser sterndrive partsOMC sterndrive partsVolvo Penta marine partsCrusader Marine partsPleasurecraft Marine partsChrysler Marine inboard partsChris Craft inboard partsMore boat engine parts Boat Motor ManualsOutboard Motor Repair ManualsEvinrude outboard manualsJohnson outboard manualsMercury outboard manualsMariner outboard manualsForce outboard manualsChrysler outboard manualsYamaha outboard manualsHonda outboard manualsSuzuki outboard manualsNissan outboard manualsTohatsu outboard manuals Inboard & Sterndrive Engine ManualsMercruiser sterndrive manualsOMC sterndrive manualsVolvo Penta marine engine manualsCrusader Marine engine manualsPleasurecraft Marine engine manualsChrysler Marine engine manualsDetroit Diesel marine engine manualsPerkins engine manualsBukh marine engine manualsChris Craft engine manualsFord Lehman/Sabre Lehman engine manualsMore inboard engine manuals Boat Accessories Boat Repair ForumFree ClassifiedsPhoto GalleryFeb. 7, 2011•Bookmark Page Mercury Outboard Serial Number Guide Mercury Outboard PartsMercury Outboard Repair Manuals Boat Repair ForumFree ClassifiedsPhoto GalleryHome|Contact|Shipping/Returns|CartBoat Engine PartsBoat Motor ManualsBoat AccessoriesAbout Us | Terms of Use | Privacy PolicyMarineEngine.com, 184 Jones Drive, Brandon, VT 05733 USA© 2009 MarineEngine.com, Inc. All rights reserved.Phone: 802-247-4700 | Fax: 802-419-3055 | eMail: info@marineengine.com
Mercury Marine uses both the serial number, and the horsepower rating, to determine the year model of their outboards.
Take it to a marine repair shop or google it up, the answer is there
The water pump impeller on a 7.5 hp Mercury outboard, is located on top of the gearcase, and is driven by the driveshaft.
Mercury Marine uses a lifting eye that threads into the flywheel hub for mounting, and removing, the engine.
Mercury wants you to install a battery with at least 525 marine cranking amps if you boat in the summer, and 1000 marine cranking amps for winter boaters.
The fuel oil ratio for a 140 hp Mariner outboard motor is 50:1. Mariner is a brand of the Mercury Marine company.
Self employed marine operators, usually having ads in weekly want ads or yellow page listings under boats/marine operations. If not comfortable in that, then then the dealership, such as mercury is a top brand too inboard/outboard motors. Depends on your boat, and rather it need an inboard/outboard, and if an outboard, then rather it need too be a long or short shafted motor.