Posts: 3504
Location: Elk River, Minnesota | Hiya,
I would start by looking for and replacing a fuel filter that should be on the motor. On Most outboards have some sort of filter on them. Older models had a screen that was part of a fuel pump assembly, but being the age of your motor and it's size, I believe you will have some filter. If you take a look at the following parts diagram, I believe you are in need of replacing it which is part number 6...the filter assembly.
https://www.boats.net/catalog/suzuki/outboard-by-model/dt-150/dt-150...
I would also suggest running a seafoam decarbonizer process where you inject decarbonator directly into the injection system to do a deep cleaning. This would be different than just dumping seafoam into the the tank and running it...this is much more concentrated.
My gut instinct says this will be a filter replacement.
Steve
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