10-47277 Mercury MerCruiser Screw (.312-24 x .750) | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Screw .312-24 x .750 - Part Number: 10-47277

A genuine Quicksilver .312-24 x .750 screw used across Mercury, Mariner and MerCruiser assemblies. This 5/16" UNF x 3/4" screw is commonly used in MerCruiser exhaust, cooling, fuel tank, mounting and bracket hardware applications, as well as selected Mercury outboard and high-performance drive assemblies where the parts diagram specifies 10-47277.

⚙️ Key Features

• Genuine Quicksilver OEM screw
• Correct Mercury part number 10-47277
• .312-24 x .750 screw specification
• 5/16" UNF x 3/4" hardware size
• Used across MerCruiser petrol engine, exhaust, cooling, fuel tank and drive hardware applications where specified

🚤 Compatibility

Commonly used on

• MerCruiser exhaust and cooling system extension kits
• MerCruiser fuel / oil tank and corrosion hardware kits
• MerCruiser GM inline 4-cylinder, inline 6-cylinder, V6 and V8 engine hardware locations
• MerCruiser inboard, ski, tow sport, Horizon and Bravo / Alpha sterndrive petrol engine assemblies
• Selected Mercury outboard and high-performance racing assemblies where 10-47277 is specified

Typically suits

• Engine / drive models:
• Mercury 60HP - serial 2385673 to 2387383
• Mercury 25XS - serial 85A001 and up
• Mercury 3.4 EFI - serial 0A953707 to 0A953736; 82H1008 to 85E1092
• Mercury 7.5J - serial 85A1101 and up
• MerCruiser 120 GM 153 I/L4 - 1964-1972 serial 1666601 to 3377340; 1972-1978 serial 3377341 to 5192048; 1979-1982 serial 5192049 to 6229717; 1983-1986 serial 6229718 to 0B531853
• MerCruiser 140 GM 181 I/L4 - 1968-1972 serial 2508261 to 3332137; 1972-1978 serial 3332138 to 5157668; 1979-1982 serial 5157669 to 6229717; 1982-1986 serial 6229718 to 0B450800
• MerCruiser 2.5L GM 153 I/L4 - 1987-1989 serial 0B531854 to 0C856558
• MerCruiser 3.0L GM 181 I/L4 - 1987-1989 serial 0B450801 to 0C856558; 1990-1994 serial 0C856559 to 0F353099; 1998 serial 0L010042 to 0L096999; serial 0L097000 to 0W301999; 0W302000 to 1A0019999; 1A002000 to 1A020543; 1A020544 and up
• MerCruiser 3.0LX GM 181 I/L4 - 1990-1995 serial 0C856559 to 0F603999; 1996-1997 serial 0F604000 to 0K999999
• MerCruiser 3.0L MPI EC - serial 1A072812 and up
• MerCruiser 3.0L TKS Plus - serial 1G404114 and up
• MerCruiser 470 2BBL Mercury 224 I/L4 - 1976-1979 serial 4208730 to 5520114; 1980-1982 serial 5520115 to 6218036
• MerCruiser 470 MIE Mercury 224 I/L4 - 1980-1981 serial 5520115 to 6218036
• MerCruiser 485 2BBL Mercury 224 I/L4 - 1980-1982 serial 5685394 to 6218036
• MerCruiser 160 GM 250 I/L6 - 1967-1969 serial 2048022 to 2770031
• MerCruiser 165 GM 250 I/L6 - 1970-1978 serial 2770032 to 5178958; 1979-1981 serial 5178959 and up
• MerCruiser 200 GM 292 I/L6 - 1969 serial 2453769 to 2712072
• MerCruiser 175 GM 262 V6 2BBL - 1987 serial 0B527955 to 0B773242
• MerCruiser 185 GM 262 V6 2BBL - 1985-1987 serial 0A331455 to 0B527954
• MerCruiser 185 GM 229 V6 4BBL - 1983-1984 serial 6330183 to 6919655
• MerCruiser 205 GM 262 V6 4BBL - 1985-1987 serial 0A331455 to 0B527954; 1987 serial 0B527955 to 0B775129
• MerCruiser 262 MAG TBI Gen+ - serial 0F803800 to 0K999999
• MerCruiser 4.3L GM 262 V6 2BBL - 1988-1992 serial 0B773243 to 0D714106
• MerCruiser 4.3L Gen II 2BBL - 1992-1993 serial 0D714107 to 0F000877
• MerCruiser 4.3LX Gen II 4BBL - 1993-1995 serial 0F001220 to 0F601126; 1996 serial 0F601127 to 0F802999
• MerCruiser 4.3LXH Gen+ 4BBL - 1996-1997 serial 0F803114 to 0K999999
• MerCruiser 4.3L Gen+ 2BBL - 1998 serial 0L010044 to 0M614999
• MerCruiser 4.3L Gen+ 4BBL Reman - serial 1G400000 and up
• MerCruiser 198 MIE GM 305 V8 2BBL - 1977 serial 4762210 to 6218461
• MerCruiser Ford 302 / 351 V8 - 215 serial 2781153 to 3395720; 215 MIE serial 2781153 to 3563181; 233 serial 4173000 to 4902304; 233 MIE serial 4173000 to 4775784; 888 serial 3108723 and up
• MerCruiser GM 327 V8 - 225 serial 2278647 to 2694014; 225 MIE serial 2278647 to 2694014; 250 serial 2314301 to 2639854; 250 MIE serial 2314301 to 2639854
• MerCruiser GM 305 V8 - 228 serial 4765100 to 5170008, 5170009 to 6218461, 6218462 to 0B525981; 230 serial 6218462 to 0B525981 and 0B525982 to 0B773739; 260 serial 6218462 to 0B525981 and 0B525982 to 0B773739; 5.0L serial 0B774445 to 0F600999 and 0L015751 to 0M599999; 5.0L Carb serial 0M600000 to 0W300009, 0W300010 to 0W309999, 0W310000 to 0W649999, 0W650000 and up; 5.0L EFI serial 0L012052 to 0L339999 and 0L331631 to 0M299999; 5.0L MPI serial 0M300000 to 0M599999, 0M600000 to 0W059999, 0W060000 to 0W309999, 0W310000 to 0W649999, 0W650000 to 1A299999, 1A300000 to 1A611927, 1A611928 to 1A623184, 1A623185 and up; 5.0LX serial 0B773740 to 0F600999
• MerCruiser GM 350 V8 - 250 serial 4768000 to 4908849; 255 MIE serial 5195909 to 5907057; 260 serial 4908850 to 6218461, 6218462 to 0B525981, 0B525982 to 0B773304; 260 MIE serial 5907058 to 0B522505 and 0B522506 to 0B788196; 270 serial 2851074 to 3077735; 280 TRS serial 4176250 to 4770199; 300 Tempest serial 6668677 to 0B430367; 320 EFI serial 0A543604 to 0B157602 and 0B157603 to 0C622418
• MerCruiser 350 MAG / 350 MPI / 357 / 377 / 383 / 385 GM small block applications - serial 0A635178 to 0B525981; 0B525982 to 0F600999; 0F601000 to 0K001526; 0K001527 to 0K999999; 0F800300 to 0K001508; 0K001509 and up; 0F415189 to 0F601999; 0F602000 to 0K001500; 0K001501 and up; 0L010019 to 0L339999; 0L331599 to 0M299999; 0M300000 to 0M599999; 0M600000 to 0W059999; 0W060000 to 0W309999; 0W310000 to 0W649999; 0W650000 to 1A299999; 1A300000 to 1A611927; 1A611928 to 1A623184; 1A623185 and up; 1G300000 and up; 1G400000 and up; 1G480748 and up; 1G481121 and up
• MerCruiser GM 427 / 454 / 482 / 502 / 540 / 572 big block and high-performance applications - 325 serial 2278747 to 3780449; 330 serial 4623115 to 6083144 and 6083145 to 0B816540; 340 MIE serial 5889914 to 0B788365; 350 MIE serial 3780450 to 4623109; 370 TRS serial 4179554 to 6721527 and 6721528 to 0B714586; 390 serial 2781129 to 2825059; 400 TRS serial 4179554 to 0B457644; 420 serial 0A398941 to 0B622418; 425 serial 0A398941 to 0D937011; 440 serial 4179554 to 0B485220; 450 serial 0F347100 to 0F347277; 454 EFI serial 0F115700 to 0F802349; 454 MAG serial 0A631894 to 0B785148, 0B721206 to 0D805068, 0D805069 to 0F304999, 0F305000 to 0F801699, 0F801700 to 0K999999; 454 MAG MPI serial 0F802350 to 0K999999, 0L010029 to 0L058399, 0L085400 to 0M024999; 454 Horizon serial 0L002200 to 0L086049 and 0L086050 to 0L674000; 465 serial 0C849992 to 0F213244; 500 / 500 Bulldog serial 0F213293 to 0F615766, 0F615767 to 0F745159, 0F745195 to 0L001772, 0K000248 to 0L001607, 0C577254 to 0F745405; 502 serial 0D840650 to 0F802599, 0C878221 to 0D824588, 0D824589 to 0F114528, 0F802600 to 0K999999, 0L017000 to 0L085432, 0L085433 to 0M024999; 525 SC serial 0D456000 to 0F348963, 0F615814 to 0F745215, 0F745260 to 0F877734, 0K000012 to 0L415623; 575 serial 0A677429 to 0D763716; 600 SC serial 0L414734 to 0L601186 and 0D456489 to 0F877642; 800 SC serial 0D763836 and up
• MerCruiser 5.7L / 5.7LX / 5.7 EFI / 5.7 MPI / Competition Ski / TowSport - serial 0B525982 to 0F600999; 0F601000 to 0K001526; 0K001527 to 0K999999; 0L010037 to 0M599999; 0F355305 to 0F752389; 0F225560 to 0F752399; 0M600000 to 0W300754; 0W300755 to 0W309999; 0W310000 to 0W649999; 0W650000 and up; 0B514627 to 0F775199; 0F775200 to 0K040003; 0K040004 to 0K999999; 0L002005 to 0M316999; 0F752400 to 0K001505; 0K001506 to 0K999999; 0L010035 to 0L339999; 0L325977 to 0M299999; 0B788197 to 0F024999; 0F025000 to 0F622099; 0F622151 to 0F746099; 0F622100 to 0F622150; 0F746100 to 0K040306; 0K040307 to 0K999999; 1A090000 to 1A092168; 1A092169 and up; 1A091881 and up
• MerCruiser 6.2L MPI / MX 6.2L / Black Scorpion - serial 1A090000 to 1A092168; 1A092169 and up; 1A091600 to 1A092168; 0L680003 to 0M299999; 0M300000 to 0M599999; 0M600000 to 0W059999; 0W060000 to 0W309999; 0W310000 to 0W649999; 0W650000 to 1A299999; 0M310000 to 0M316999; 0M317000 to 0M398394; 0M398395 to 0W389999; 0W390000 to 0W689999; 0W690000 to 1A089999; Black Scorpion serial 0M391600 to 0W689999, 0W690000 to 0W698432, 0F800000 and up, 0K040001 to 0M391599, 0L670015 to 0M391599
• MerCruiser 7.4L / 7.4LX - serial 0B771113 to 0D603117; 0D603118 to 0F800699; 0F800700 to 0K999999; 0L010003 to 0M024330; 0D715494 to 0F820141; 0F602010 to 0F801999; 0F802000 to 0K999999; 0F820000 to 0K999999
• MerCruiser 8.1L TowSport / Inboard - serial 1A380074 and up; 1G300000 and up
• MerCruiser 8.2L Inboard Base EC / H.O. EC - serial 1A350802 to 2A041664; 2A041665 and up
• MerCruiser Scorpion 350 / 350 EC / 377 / 377 HO EC - serial 0W698433 and up; 1A091488 to 1A092170
• MerCruiser exhaust / cooling system and extension kits - 1985 and below; 1986 through 1993; 1994 and up
• MerCruiser fuel / oil tanks, lines, filter kits and corrosion hardware - 1986 through 1993
• Engine / Drive Type: Mercury / Mariner outboard, MerCruiser petrol sterndrive, inboard and high-performance applications where the hardware diagram specifies 10-47277
• Hardware Size: .312-24 x .750 / 5/16 UNF x 3/4
• System Type: Screw hardware for mounting, bracket, exhaust, cooling, fuel tank, corrosion and related service locations

🔌 Function

This screw secures compatible brackets, covers, cooling-system parts, exhaust-system parts, fuel / oil tank hardware and related Mercury / MerCruiser components. Correct thread size and length are important to maintain clamping force without bottoming out or damaging the component.

⚠️ Common Signs of Failure

• Screw head rounded or damaged during service
• Corroded threads or seized hardware
• Missing screw after exhaust, cooling or bracket repair
• Incorrect thread length fitted during reassembly
• Loose bracket, cover or system component
• Replacement required during engine, drive or accessory hardware service

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 10-47277 current OEM service reference

OEM / Related Numbers

• 10-47277
• 47277
• MER10-47277
• Mercury 10-47277
• Quicksilver 10-47277
• 5/16 UNF x 3/4 screw reference
• .312-24 x .750 screw reference
• 13-39107 related .312-24 lock washer
• 13-35048 related .375 lock washer
• 10-34352 related .375-24 x .875 screw
• 10-32132 related .375-16 x 1.750 screw
• 10-37612 related .375-16 x 1.250 screw
• 10-34353 related .375-16 x 1.00 screw
• 10-47688 related .375-16 x 2.750 screw
• 12-815952 related washer
• 11-32219 related .375-16 nut

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine Quicksilver part
• Brand new
• Supplied in original or equivalent packaging