What does the air compressor do on a Mercury OptiMax?
The Optimax Air Compressor is the “secret” to the Optimax’s excellent performance. The Air Compressor builds about 80 PSI of air pressure in the fuel rails. This is balanced by an air pressure regulator to be 10 PSI less than the fuel pressure. Any drop in air pressure will dramatically reduce engine performance.
What does a compressor do on a outboard motor?
The main marine air compressor stores pressurized air, so it can be released when the engines start.
Are OptiMax engines good?
The Mercury Marine OptiMax 150 is the middle of three direct fuel-injection two-stroke outboards from 135 to 175hp, all of which use the same 60° V6 powerhead. The 2.5lt loop-charged powerhead has been around a long, long time and in my opinion is one of the best Mercury engines.
How do you prime the oil pump on a Mercury OptiMax?
oil pump prime is BEST done with the CDS (or a DDT), as that avoids placing the engine back into break-in mode. -Shifter must be moved from NEUTRAL to FORWARD at least 3 times in the first FIVE SECONDS after key is turned on.
How do you check compression on an inboard boat motor?
It is measured by inserting a fitting into the spark plug’s threaded hole in the engine cylinder head, cranking the engine over through multiple rotations, and reading the pressure measurement on a gauge attached by a hose. It is measured in PSI (pounds per square inch) or kPa (KiloPascal).
What should the compression be on a Mercury outboard?
What Outboard Compression Test Results Mean. Results vary depending on whether the outboard is a Four-Stroke or a Two-Stroke. Good results for Four-Strokes should be 180-210 PSI, and Two-Strokes should be around 110-130 PSI.
What year did Mercury stop making OptiMax?
2018
Optimax was discontinued in 2018 when the new-generation V6 and V8 4-strokes were introduced.