Type your answer here... It backfires because it is a Briggs and Stratton - replace it with a Honda or Kholer.
The maximum speed of the 1976 Fiat 131 4cyl 65hp is 78 mph.
65hp
90 mph was the maximum speed of ford cortina 4cyl 65HP 1967.
The maximum speed of a 1962 simca 5 4cyl 65HP is 65mph or 104kph.
50:1
Gas/Oil Mix = 50:1
50:1
model # is year made last two didgets
if im not mistaking it was around 90mph/ 120km
The 58HP version had a top speed of 76 mph (122.3 kph).
A 65 hp Mercury outboard, serial number 3149254, is a 1971 year model.
Almost positive it's 50:1 Have a 650 65hp Merc and that's what it is.