5EA
look under the cowling, my merc. 25 tiller gap is .40
.040
.04 inch
For a 1971 Johnson 25 hp outboard motor, the recommended spark plug is the Champion J6C or an equivalent, such as the NGK B6HS. Ensure that the spark plug gap is set to the correct specification, typically around 0.030 inches. Always refer to the owner's manual for specific recommendations and maintenance practices.
a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke; Samuel de Champlain died in Quebec on December 25 1635a stroke
The spark plugs come pre-set. NGK B7HS-10. THe last (2) numbers of "10" indicate the pre-set gap.
A new Merc runs double oil for the first 10 hrs (25:1) If it is oil injected (most likely) put 50:1 in the tank and check that the oil res is actually going down. (injection working). Then just use PULP in the tank from then on. If it is not oil injected run 50:1 All Merc/Mariners run 50:1
Check/change the spark plugs first. (4 NGK iridium plugs, about 25 dollars a plug)Plug wires next.Coils after that. (stock coils fail when spark plugs foul)If the issue is not resolved by the ignition fixes, get a compression check from a rotary knowledgeable mechanic.
A Stroke of GeniusA Stroke of Genius
I have been researching this same engine tonight. I've gotten 1 reply and they say 25:1. I suppose this is because it is air cooled. Plugs are suppose to be NGK B7HS gapped at .024
NGK B7HS-10 - Plug Gap 0.9 mm/0.035 inFits 6 ('86 - '00), 8 ('86 - '04), Fits 9.9/15 ('84 - '04), 20 ('96 - '97), 25 ('84 - '04 2 cyl.), 25 ('96 - '02 3 cyl.), 30 ('87 - '02 3 cyl.), 40 ('84 - '04), C40 ('97 - '02 3 cyl.)
A Hunger Stroke - 1928 was released on: USA: 25 February 1928