I also have a four cylinder Suzuki dt7.5hp outboard with no oil tank. What is the oil/fuel mixture?
Answer.Suzuki engines have only had two different types of oil ratio 50:1 and 100:1.If you are not sure then run the engine on 50:1 ratio because too much oil will not harm the engine but too little will.The excess oil will burn off anyway.I have a 1987 Suzuki DT8 2 Stroke Outboard. The ratio for that engine is 100:1. If you add too much oil to any 2 cycle engine, the excess oil can damage the carburetor and may cause the engine to quit running.
50:1
20:1
32:1
50:1 ratio
VERY likely your fuel mix is too lean. Adjust the air/fuel mix settings and it should fix it.
There is no fuel mix needed they are 4 stroke air cooled. Just use straight gas. dbg
2% fullsuntetic oil
recomand mix 1/30 denicol racing 2t oil
switch up the air fuel mix on the carb or maby the spark plug is bad
50:1, I usually put 400mL into a 20L jerry can.
on the cowl of my 1993 DT2 suzuki it states 100 to 1 mix.
for my 1982 Cr125 the gas mixture is 40:1... not positive if its the same for a 250... but my suzuki 1991 suzuki 250 is also 40:1 so its most likely 40:1...