2stroke.
1988-89
The 2000 model, Mercury 25 hp outboard, requires a minimum octane 89 rated, unleaded fuel, however, with the quality of gasoline being what is presently, it would not hurt to run the higher octane fuels.
It is a 2-stroke
i have a 89 DT 15hp Suzuki with a oil injector that is leaking and no longer working. we use a 50:1 mixture and have had no problems with it running right. strong little motor!!
Most all outboard engines have been designed to run on 89 octane fuel. Given the current gasoline situation however, I recommend higher octane, alcohol free fuels to my customers.
A Mercury 40 hp outboard motor typically requires a minimum of 87 octane fuel, which is regular unleaded gasoline. For optimal performance and to prevent knocking, using fuel with an octane rating of 89 or higher is often recommended, especially under heavy loads or in warmer temperatures. Always refer to the owner's manual for specific fuel recommendations for your model.
Check for an air leak in your fuel line and/or bad gas. Make sure you are getting spark and your compression in each cylinder is within 10% of the others. Check to make sure the ground is good on your engine.
An 89 Suzuki LT250 is a 2 Stroke not a 4 Stroke.
Ford Motor Company makes Fords, Lincolns & Mercurys. The Mercury Sable is the same car as a Ford Taurus, just different names and a little different trim. they use the same parts.
I have that motor in my 89 Volvo penta boat. But also know that it's in 86 to 89 chev gmc trucks.
For a 1996 Mercury boat motor, it's generally recommended to use regular unleaded gasoline with an octane rating of 87. However, if the engine is high-performance or shows signs of knocking, you may consider using mid-grade fuel with an octane rating of 89. Always consult the owner's manual for specific recommendations tailored to your motor model.
No motor