Mercury Outboard Spark Plug Chart (Explained)

Do you know when your Mercury spark plug needs replacement? Mercury outboard comes with reliable spark plugs, so you don’t need to replace it often. However, it will be better if you change the spark plugs in your Mercury outboard motor every year or per 1000 hours.

When it comes to changing the spark plug on your Mercury outboard, you might need a mercury outboard spark plug chart. The chart will help you choose the appropriate spark plug for your outboard motor.

And luckily, this blog will share a descriptive chart of Mercury 2 and 4-stroke spark plugs.

Mercury Outboard Spark Plug Chart

Mercury Marine is well-known for manufacturing high-standard outboard motors. Over the last few years, the company has introduced some superficial outboard motors, which are impressive in horsepower and torque.

However, in some cases, it may happen that the spark plugs on your Mercury outboard go bad. In this case, you should replace the spark plug badly to ensure the outboard motor’s proper functioning.

But, as Mercury outboard has a long list of spark plugs, identifying or choosing the right one is always the key. We will make that job easier for you.

First, we will let you know the chart of 4-stroke spark plugs, and the 2-stroke spark plugs chart will be followed by it.

4-Stroke Mercury Spark Plug Chart

Outboard ModelsSpark Plug GapSuppressor (resistor) Spark Plug Manufacturer’s Part NumberOrigin (Country)Spark Plugs Serial and RangeSuppressor (resistor) Mercury Spark Plug Number
2.5 4 Stroke.033NGK DCPR6EJapan0R131842 33-803507
3.5 4 Stroke.033NGK DCPR6EJapan0R131842 33-803507
4 4 Stroke.035NGK DCPR6EJapan0R000001 33-803507
4 4 Stroke.035NGK DCPR6EBelgium0P073456 33-803507
5 4 Stroke.035NGK DCPR6EJapan0R000001 33-803507
5 4 Stroke.035NGK DCPR6EBelgium0P073456 33-803507
6 4 Stroke.035NGK DCPR6EJapan0R000001 33-803507
6 4 Stroke.035NGK DCPR6EBelgium0P073456 33-803507
8 4 Stroke.026NGK CR6HSUnited States0H000058 – 0H01734933-827859
8 4 Stroke.026NGK CR6HSUnited States0G760300 – 0T17849933-827859
8 4 Stroke.035NGK DPR6EA-9Belgium0P086824 – 0P32549933-827858Q
8 4 Stroke.033NGK DCPR6EJapan0R042475 33-803507
8 4 Stroke.033NGK DCPR6EBelgium0P325500 33-803507
9.9 4 Stroke.026NGK CR6HSUnited States0H000058 – 0H01690933-827859
9.9 4 Stroke.035NGK DPR6EA-9United States0G760300 – 0T97999933-827858Q
9.9 4 Stroke.035NGK DPR6EA-9Belgium0P075166 – 0P32549933-827858Q
9.9 4 Stroke.033NGK DCPR6EJapan0R042475 33-803507
9.9 4 Stroke0.33NGK DCPR6EBelgium0P325500 33-803507
15 4 Stroke, 323cc.035NGK DPR6EA-9United States0G590000 – 1B72749533-827858Q
15 4 Stroke, 323cc.035NGK DPR6EA-9Belgium9973100  33-827858Q
15 4 Stroke, 323cc.033NGK DCPR6EJapan0R235949 33-803507
20 4 Stroke (Carb).033NGK DCPR6EJapan0R235168 33-803507
25 4 Stroke (Carburetor).035NGK DPR6EA-9United States0G590000 – 1B34429833-827858Q
25 4 Stroke (Carb).035NGK DPR6EA-9Belgium9973100 – 0P38828233-827858Q
25 4 Stroke (Carb).033NGK DCPR6EJapan0R106999 33-803507
25 4 Stroke (Carb).033NGK DCPR6EBelgium0P401000 33-803507
25 4 Stroke (Carb).033NGK DCPR6EJapan 0R165086 33-803507
30 (Carb) 4 Stroke.035NGK DPR6EA-9United States0G760300 – 1B22699933-827858Q
30 (Carb) 4 Stroke.040NGK DPR6EA-9Belgium0P094500 – 0P40099933-827858Q
30 (Carb) 4 Stroke.033Champion RA8HCUnited States 0T409000 – 1B22699933-883323001
30 (Carb)  4 Stroke.035NGK DCPR6EJapan0R106999 33-803507
40 (3 cyl. Carb) 4 Stroke.035NGK DPR6EA-9United States0G760300 – 1B22699933-827858Q
40 (3 cyl. Carb) 4 Stroke.040NGK DPR6EA-9Belgium0P094500 – 0P40099933-827858Q
40 (3 cyl. Carb) 4 Stroke.040Champion RA8HCUnited States0T409000 33-883323001
40 (3 cyl. Carb) 4 Stroke.040Champion RA8HCBelgium0P153500 33-883323001
40 (3 cyl. Carb) 4 Stroke.035Champion RA8HCChine1C000001 33-883323001
40 (3 cyl. Carb) 4 Stroke.035NGK DPR6EA-9United States0G231123 – 0T17849933-827858Q
40 (3 cyl. Carb) 4 Stroke.035NGK DPR6EA-9United States0T228405 – 0T59899933-827858Q
40 (3 cyl. Carb) 4 Stroke.040NGK DPR6EA-9Belgium0P094500 – 0P20699933-827858Q
40 (3 cyl. Carb) 4 Stroke.040Champion RA8HCUnited States0T409000 33-883323001
40 (3 cyl. Carb) 4 Stroke.040Champion RA8HCBelgium0P207000 33-883323001
40 (3 cyl. Carb) 4 Stroke.040Champion RA8HCChine1C000001 33-883323001
40 JET (4 cyl. EFI) 4 Stroke.040Champion RA8HCChine1C051324 33-883323001
50 4 Stroke.035NGK DPR6EA-9United States0G231123 – 0T178499 N33-827858Q
50 (Carb) 4 Stroke.035NGK DPR6EA-9United States0T178500 – 0T59899933-827858Q
50 (Carb) 4 Stroke.035NGK DPR6EA-9Belgium0P094500 – 0P20699933-827858Q
50 (EFI) 4 Stroke.040NGK DPR6EA-9United States0T409000  33-883323001
50 (EFI) 4 Stroke.040NGK DPR6EA-9Belgium0P207000 33-883323001
50 (EFI) 4 Stroke.040Champion RA8HCChine1C000001 33-883323001
60 (Carb) 4 Stroke.035Champion RA8HCUnited States0T178500 – 0T59899933-827858Q
60 (Carb) 4 Stroke.035Champion RA8HCBelgium0P094500 – 0P20699933-827858Q
60 (EFI) 4 Stroke.040NGK DPR6EA-9United States0T409000 33-883323001
60 (EFI) 4 Stroke.040NGK DPR6EA-9Belgium0P207000 33-883323001
60 (EFI) 4 Stroke.040Champion RA8HCChine1C000001 33-883323001
75 4 Stroke, 1596cc.043Champion RA8HCUnited States 0G960500 – 1B366822859495Q
75 4 Stroke, 1.7L.032Champion RA8HCUnited States1B366823 33-898829001
80 4 Stroke, 1.7L.032NGK LFR5A-11United States1B366823 33-898829001
80 4 Stroke.032NGK LFR4A-EBelgium0P401000 33-898829001
90 4 Stroke, 1596cc.043NGK LFR4A-EUnited States0G960500 – 1B366822859495Q
90 4 Stroke, 1.7L.032NGK LFR4A-EUnited States1B366823  33-898829001
100 4 Stroke, 1.7L.032NGK LFR5A-11United States1B366823 33-898829001
100 4 Stroke.032NGK LFR4A-EBelgium0P401000 33-898829001
115 (EFI) 4 Stroke, 1741cc.041NGK LFR6A-11United States0T178500 – 1B36682233-881284Q
115 (EFI) 4 Stroke, 1.7L.032NGK LFR4A-EUnited States1B366823  33-898829001
135 Verado.031NGK ILFR6GEUnited States1B227000  33-889246Q39
135 Verado.032NGK ILFR6GEBelgium0P419487 33-889246Q39
150 EFI 4 Stroke.031NGK ZFR5FUnited States1B905505  33-8M0057936
150 Verado.031NGK ILFR6GEUnited States  1B227000 33-889246Q39
150 Verado.031NGK ILFR6GEBelgium  0P419487 33-889246Q39
175 Verado.031NGK ILFR6GEUnited States1B227000  33-889246Q39
175 Verado.031NGK ILFR6GEBelgium0P464488 33-889246Q39
200 Verado, 4&6 cylinder.031NGK ILFR6GEUnited States0T980000 33-889246Q39
200 Verado, 4&6 cylinder043NGK ILFR6GEBelgium0P409357 33-889246Q39
225 (EFI)  4 Stroke.031NGK LFR5A-11United States0T653945  859495Q
225 Verado.031NGK ILFR6GEUnited States0T980000 33-889246Q39
225 Verado.031NGK ILFR6GEBelgium0P409357 33-889246Q39
250 Verado.031NGK ILFR6GEUnited States0T980000 33-889246Q39
250 Verado.031NGK ILFR6GEBelgium0P409357 33-889246Q39
275 Verado.031NGK ILFR6GEUnited States0T980000 33-889246Q39
275 Verado.031NGK ILFR6GEBelgium0P409357 33-889246Q39
300 Verado.031NGK ILFR6GEUnited States0T980000 33-889246Q39
300 Verado.031NGK ILFR6GEBelgium0P520553 33-889246Q39
350 Verado.031NGK ILFR6GEUnited States1B718256 33-889246Q39

2-Stroke Mercury Spark Plug Chart

ModelGapSpark Plugs Serial and RangeOrigin (Country)Spark Plug Manufacturer’s Part NumberSuppressorSpark Plug Manufacturer’s Part NumberSuppressor(resistor) Mecury Spark Plug NumberStandard Mercury Spark Plug  Part Number
2.2.0408075603 United StatesNGK BPR6HS-1033- 1979633- 19796
2.5.0400A855097 NGK BP6HS-10NGK BPR6HS-1033- 1979633- 19796
3.0400A855097 – 0G710612NGK BPR6HS-1033- 1979633- 19796
3.3.0400D901217 United StatesNGK BP6HS-10NGK BPR6HS-1033- 1979633- 19796
3.5.0406202173 United StatesNGK BP6HS-10NGK BPR6HS-1033- 1979633- 19796
3.6.040404657 BelgiumNGK BP6HS-10NGK BPR6HS-10 33- 1771954733- 17719547
3.6.0409252831 United StatesNGK BP6HS-10NGK BPR6HS-10 33- 1771954733- 17719547
3.6.0407145388 CanadaNGK BP6HS-10NGK BPR6HS-10 33- 1771954733- 17719547
3.9 (39).0251655013 – 2498135NGK B5HS
4 (40)(1 cyl.).0302498136 – 2771621NGK B5HS
4 (40)(1 cyl.) 2771622 – 0A809600NGK BUHW-2NGK BUZHW-233- 14103Q 33- 14103Q
4 (40)(2 cyl.) Gnat.0509075839 – 9256980Belgium NGK B6HSNGK BR6HS33-81347233-813472
4 (40)(2 cyl.) Gnat.0507085673 – 7146487CanadaNGK B6HSNGK BR6HS33-81347233-813472
4 (40)(2 cyl.).0405589202 – 5595531United StatesNGK BP7HS-10NGK BPR7HS-1033- 1771954733- 17719547
4 (40)(2 cyl.).0408065265 – 8068064AustraliaNGK BP7HS-10NGK BPR7HS-1033- 1771954733- 17719547
4 (40)(2 cyl.).040256981 – 9258280BelgiumNGK BP7HS-10NGK BPR7HS-1033- 1771954733- 17719547
4 (40)(2 cyl.).0407146488 – 7143687CanadaNGK BP7HS-10NGK BPR7HS-1033- 1771954733- 17719547
4 (1 cyl.).0400A809601 BelgiumNGK BP7HS-10NGK BPR7HS-1033- 1771954733- 17719547
4 (1 cyl.).040 9477830 CanadaNGK BP7HS-10NGK BPR7HS-1033- 1771954733- 17719547
4.5 (45)(1 cyl.) 4107220 – 0A809600United StatesNGK BUHW-2NGK BUZHW-233- 14103Q33- 14103Q
4.5 (45)(1 cyl.) 8026540 AustraliaNGK BUHW-2NGK BUZHW-233- 14103Q33- 14103Q
4.5 (45)(1 cyl.) 9072179 – 9477829BelgiumNGK BUHW-2NGK BUZHW-233- 14103Q33- 14103Q
4.5 (45)(1 cyl.) 45758 CanadaNGK BUHW-2NGK BUZHW-233- 14103Q33- 14103Q
5 (1 cyl.).0400A809601 United StatesNGK BP7HS-10NGK BPR7HS-1033- 1771954733- 97184
5 (1 cyl.).0409477830  BelgiumNGK BP7HS-10NGK BPR7HS-1033- 1771954733- 97184
6 (60).0251408611 – 2126763United StatesNGK B6S33-813469
6 (60).0251958792 – 2096170CanadaNGK B6SN/AN/A33-813469
6 (60)(60J).0302126764 United StatesNGK B6HSNGK BR6HS33-81347233- 82370M 1
6 (60)(60J).030 2096171 CanadaNGK B6HSNGK BR6HS33-81347233- 82370M 1
60400A197112 – 0T800749United StatesNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
60409461526  BelgiumNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
7.5 (75)2529895 – 3801457 NGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
7.5 (75)3801458 – 4851692United StatesNGK BUHWNGK BUHW33- 1410355033- 97182Q
7.5 (75)8015315 – 8051349AustraliaNGK BUHWNGK BUHW33- 1410355033- 97182Q
7.5 (75)9043194 – 9181725BelgiumNGK BUHWNGK BUHW33- 1410355033- 97182Q
7.5 (75)7028598 – 7111897CanadaNGK BUHWNGK BUHW33- 1410355033- 97182Q
7.5 (75)4851693 – 5226934United StatesNGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
7.5 (7508051350 – 8058019AustraliaNGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
7.5 (75)81726 – 9219255BelgiumNGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
7.5 (75)7111898 – 7136037CanadaNGK BUHW-2NGK BUHW-233- 14103Q33- 97186
7.5.0405206550 United StatesNGK B9HS-10NGK B9HS-1033-81341833- 97186
7.5.0408057545 AustraliaNGK B9HS-10NGK B9HS-1033-81341833- 97186
7.5.0409217756 BelgiumNGK B9HS-10NGK B9HS-1033-81341833- 97186
7.5.0407125388 CanadaNGK B9HS-10NGK B9HS-1033-81341833-816737Q
8.0400A197112 United StatesNGK BP8H-N-10 3NGK BP8H-N-10 333-816837Q33-816737Q
8.0409461526 BelgiumNGK BP8H-N-10 3NGK BP8H-N-10 333-816837Q33-816737Q
9.8 (110).0251470349 – 2098351NGK B6SNGK B6S33-813469
9.8 (110).0302098352 – 2798056NGK B7HSNGK B7HS33- 82371M
9.8 (110)2798057 – 3795657NGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
9.8 (110)3795658 – 4839253United StatesNGK BUHWNGK BUHW33- 1410355033- 97182Q
9.8 (110)8015040 – 8050624AustraliaNGK BUHWNGK BUHW33- 1410355033- 97182Q
9.8 (110)9041439 – 9165304BelgiumNGK BUHWNGK BUHW33- 1410355033- 97182Q
9.8 (110)7027323 – 7111347CanadaNGK BUHWNGK BUHW33- 1410355033- 97182Q
9.8 (110)4839254 – 5206549United StatesNGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
9.8 (110)8050625 – 8057544AustraliaNGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
9.8 (110)9165303 – 9217755BelgiumNGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
9.8 (110)7111348 – 7125387CanadaNGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
9.8.0405206550 United StatesNGK B9HS-10NGK B9HS-1033-81341833- 97186
9.8.0408057545  AustraliaNGK B9HS-10NGK B9HS-1033-81341833- 97186
9.8.0409217756 BelgiumNGK B9HS-10NGK B9HS-1033-81341833- 97186
9.8.0407125388  CanadaNGK B9HS-10NGK B9HS-1033-81341833- 97186
9.9.0400A197112 – 0G112449 3United StatesNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
9.9.0409461526 – 9831799BelgiumNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
9.9.0600G112450  United StatesNGK BP8HS-15NGK BP8HS-1533- 1481456833- 19424
9.9.0609831800 BelgiumNGK BP8HS-15NGK BP8HS-1533- 1481456833- 19424
10 (100).0251290910 – 1499331NGK B6SNGK B6SN/A33-813469
10 (XR10/SEA PRO 10).0600D038000  United StatesNGK BP8HS-15NGK BP8HS-1533- 1481456833- 19424
10 (XR10/SEA PRO 10).0609596000 BelgiumNGK BP8HS-15NGK BP8HS-1533- 1481456833- 19424
10 Magnum/Marathon.0600D038000  United StatesNGK BP8HS-15NGK BP8HS-1533- 1481456833- 19424
10 Magnum/Marathon.0609596000 BelgiumNGK BP8HS-15NGK BP8HS-1533- 1481456833- 19424
15 (150).0251290910 – 1499331 3NGK B6SNGK B6SN/A33-813469
15.0600B292414 United StatesNGK BP8HS-15NGK BP8HS-1533- 1481456833- 19424
15.0609542620 BelgiumNGK BP8HS-15NGK BP8HS-1533- 1481456833- 19424
15 Sea Pro/Marathon0400G044365 – 0G437999United StatesNGK BP8H-N-10NGK BP8H-N-1033-816837Q99 33-816737Q
15 Sea Pro/Marathon.0600G438000  United StatesNGK BP8HS-15NGK BP8HS-1533- 1481456833- 19424
15 Sea Pro/Marathon.0609927000 BelgiumNGK BP8HS-15NGK BP8HS-1533- 1481456833- 19424
15 Sea Pro XD.0409927000 United StatesNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
15 (Super 15).0400B238464 BelgiumNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
15 (Super 15).0409507381  CanadaNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
15 (Super 15).0400A730007 United StatesNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
18 (18, 18XD).0405837437 AustraliaNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
18 (18, 18XD).0408071973 BelgiumNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
18 (18, 18XD).040L 9308306 NGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
20 (200).0251290910 – 1499331NGK B6SNGK B6SN/A33-813469
20 (200).0251558310 – 2094830NGK B6SNGK B6SN/A33-813469
20 (20, 200).0302827677 – 6443972United StatesNGK B7HSN/AN/A33- 82371M
20 (20, 200) 8006265 AustraliaNGK BUHW-2N/A33- 14103Q33- 97182Q
20 (20, 200) 9016254 – 9415100BelgiumNGK BUHW-2N/A33- 14103Q33- 97182Q
20 (20, 200) 7012358 – 7209532CanadaNGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
20 (20, 20XD).0406443973 – 0T800749United StatesNGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
20 (20, 20XD).0409415101  BelgiumNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
20 (20, 20XD).0407209533 CanadaNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
20 JET.0405705532 United StatesNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
20 JET.0408073158 AustraliaNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
20 JET.0409315316 BelgiumNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
20 JET.0407166928  CanadaNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
25 (250).0251290910 – 1499331NGK BP8H-N-10N/A33-816837Q33-816737Q
25 (25, 25XD, 20 JET).0405705532 United StatesNGK B6SNGK B6SN/A33-813469
25 (25, 25XD, 20 JET).0408073158 AustraliaNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
25 (25, 25XD, 20 JET).0409315316 BelgiumNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
25 (25, 25XD, 20 JET).0407166928 CanadaNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
25 LIGHTNING(3 cyl).0350E268781 United StatesNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
30 (300).0251271884 – 1960826Champion L82CN/A33-89632987433-896323
30 (2 cyl.)644cc.0400G053314 – 0T598999United StatesNGK B6SNGK B6SN/A33-813469
30 (2 cyl.)644cc.0409854537 – 0P206999BelgiumNGK BP8H-N-10NGK BP8H-N-1033-816837Q9 33-816737Q
30 (Lightning)430cc.0400G575500  United StatesNGK BP8H-N-10NGK BP8H-N-1033-816837Q9 33-816737Q
30 JET (4 cylinder) 0C159200 – 0G589999United StatesNGK B7HS-10NGK B7HS-1033-82894233- 41263M
30 JET (4 cylinder) 9570790 – 9973099BelgiumNGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
30 JET (3 cylinder).0400G590000 – 0T178499United StatesNGK BUHW-2NGK BUHW-233- 14103Q33- 97182Q
30 JET (3 cylinder).0409973100 – 0P094499BelgiumNGK BP8H-N-10NGK BP8H-N-1033-816837Q33-816737Q
35 (350, 35A).0251271884 – 1960826NGK BP8H-N-10N/A33-816837Q33-816737Q
35 (350).0251960827 – 2097831NGK B6SN/AN/A33-813469
35 (350).0302097832 – 2874703NGK B7SN/AN/A33-813413
35 6445653 United StatesNGK B7HSNGK BUZHWN/A33- 82371M
35 9384476  BelgiumNGK BUHWNGK BUZHW33- 1410355033- 97180Q
35 7209608 CanadaNGK BUHWNGK BUZHW33- 1410355033- 97180Q
40 (400).0251279685 – 1476509NGK BUHWN/A33- 1410355033- 97180Q
40 (40, 400, 402) 2874704 – 0G053313United StatesNGK B6SNGK BUZHWN/A33-813469
40 (40, 400, 402)  8002335  AustraliaNGK BUHWNGK BUZHW33- 1410355033- 97180Q
40 (40, 400, 402) 3339688 BelgiumNGK BUHWNGK BUZHW33- 1410355033- 97180Q
40 (40, 400, 402) 3340783 CanadaNGK BUHWNGK BUZHW33- 1410355033- 97180Q
40 (2 cyl.).0400G053314  United StatesNGK BUHWNGK BPZ8H-N-1033- 1410355033- 97180Q
40 (3 cyl.).0400G531301  NGK BP8H-N-10NGK BPZ8H-N-1033- 1410355033-816737Q
40 (3 cyl.).0409973100 BelgiumNGK BP8H-N-10NGK BPZ8H-N-1033-816837Q33-816737Q
40 (4 cyl.) 0C159200  United StatesNGK BP8H-N-10NGK BUZHW-233-816837Q33-816737Q
40 (4 cyl.) 9570790  NGK BUHW-2NGK BUZHW-233-816837Q33- 97182Q
40 JET.0400T178500 United StatesNGK BUHW-2NGK BPZ8H-N-1033- 14103Q33- 97182Q
40 JET.0400P094500  BelgiumNGK BP8H-N-10NGK BPZ8H-N-1033- 14103Q33-816737Q
45 (450).0251476510 – 1531568NGK BP8H-N-10N/AN/A33-816737Q

Frequently Asked Questions (FAQs)

What Spark Plugs Does Mercury Use?

Mercury uses different types of spark plugs on its outboard motor. In addition, the  spark plugs come with different models, manufacturer numbers, strokes, years, gaps, etc. And needless to say, you should choose the spark plugs that best match your mercury outboard motor. 

How Often Do You Change Spark Plugs in Mercury Outboard?

First thing first, you should not make any delay if you find the spark plugs on your Mercury spark plugs become damaged or worn out. In addition, every spark plugs have a lasting period; therefore, you need to change the spark plugs afterward. In terms of Mercury outboard spark plugs, it is recommended to replace them after one year or every 100 hours.

Do Boats Need Spark Plugs?

If your boat has an engine like a speed boat, it needs spark plugs to run the motor comprehensively. Also, malfunctioning spark plugs cause some negative effects on your boat motor, and they need to change when required.

What Is the Torque for Mercury Outboard Spark Plugs?

On average, you will find a tightening torque of 18-20 ft. lbs with the Mercury spark plug torque. However, the amount of torque might vary on the model of the Mercury outboard motor and spark plugs in it. In addition, you can also have the luxury of torque setting.

How Do I Know if My Spark Plug Is Dying?

There are signs that will tell you that the spark plugs on your Mercury outboard have gone bad. The possible symptoms are; engine stalling, engine hard to start, poor acceleration, loss of engine power, etc. Above all, you will notice a big performance drop in your speed boat.

What Is the Difference Between a Marine Spark Plug and a Regular Spark Plug?

Both the marine spark plugs and regular spark plugs have a bunch of similarities. However, when it comes to body material, there is a slight difference; the marine spark plugs come with alloy bodies. In addition, they have more rust. On the other hand, you won’t find these features with regular spark plugs.

Final Words

Here, you’ve got a mercury outboard spark plug chart. The charts above will help you determine what type of motor your Mercury outboard needs in order to run properly. In addition, make sure you know the model number of your Mercury motor. It will provide you with a lot of ease while replacing defective spark plugs.

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