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To increase compression on a Johnson 85hp outboard, you can start by ensuring that the cylinder heads are in good condition and properly torqued to specifications. You might also consider replacing the head gaskets with thinner ones to reduce the combustion chamber volume. Additionally, checking and potentially replacing rings or pistons can help improve sealing and compression. However, any modifications should be approached cautiously, as they can affect engine performance and longevity.
What else can I help you with?
What is the compression on a 1978 Johnson 85hp?
The compression ratio for a 1978 Johnson 85hp outboard motor is typically around 130 to 150 psi per cylinder when measured with a compression gauge. It's important to ensure that all cylinders have similar readings for optimal performance. If compression is significantly lower in any cylinder, it could indicate issues such as worn rings or a blown head gasket. Regular maintenance can help maintain good compression levels.
What is the weight of a 1990 Yamaha 85hp outboard motor?
The dry weight of an 85hp Yamaha outboard is 245lbs.
What is the spark plug gap on a 1977 85hp Johnson outboard?
Champion L77-JC4 plug set to .030in.
How much oil does the foot of a 85hp Johnson outboard take?
An 85hp Johnson outboard typically requires about 2 to 3 quarts of oil for its lower unit. It's important to refer to the specific owner's manual for your model to ensure accurate measurements and proper maintenance. Always check the oil level and use the recommended oil type for optimal performance.
How fast is a Yamaha 85hp outboard motor?
60kph
How old is a mercury 85hp Blue Band outboard motor serial number 3867469?
An 85hp Mercury outboard, serial number 3867469, is a 1974 year model.
What should compression be on a 1994 85hp Yamaha outboard motor?
For a 1994 85hp Yamaha outboard motor, the ideal compression should typically be around 100-120 psi per cylinder. It's important for the compression to be consistent across all cylinders, with no more than 10% variation between them. If the compression is significantly lower than this range or if there are large discrepancies, it may indicate issues such as worn rings or valves that need to be addressed. Always consult the owner's manual or a professional mechanic for specific guidelines related to your model.
How do you bleed an oil line on a 1987 suzuki outboard?
how do i bleed the oil pump on a 85hp suzuki outboard
What is the fuel mix for a 1979 85hp Johnson seahorse outboard motor?
The fuel mix for a 1979 85hp Johnson Seahorse outboard motor typically requires a 50:1 ratio of fuel to oil. This means you should use 2.6 ounces of oil per gallon of gasoline. It's important to use a good quality two-stroke oil designed for outboard motors to ensure optimal performance and engine longevity. Always refer to the owner’s manual for specific recommendations and adjustments based on your usage.
What is the gas to oil ratio mix for a 85hp force outboard?
50:1
What is the oil to fuel ratio on a 1975 85HP mercury outboard?
50:1 /16Oz.per 6 Gals. gas. I have the same outboard.
How old is a mercury 85hp outboard motor serial number 4295521?
1975-76.
