RPM problem

[Charger1]

Hello fellow forum members. My name is Graham. I have a 1989 200 Suzuki outboard on a 20 foot Charger Bass Boat. Until yesterday, my motor was running fine. I took a friend fishing and when I gave the motor throttle, it would not exceed 1800 rpm, and sounded horrible. I could not get the boat on plane. It idled fine but would not let me exceed 1800 rpm without bogging down. When I got home, I checked the obvious, cleaned the plugs, looked for bad connections, etc. Any help would be appreciated. By the way, I only use straight gasoline, no ethanol additives.

[Solarman]

I would pull my service manual and start by testing the gear counter coil, and some of the other sensors, oil temp, and check your fuel pumps for problems. Pay attention to the clear discs (check valves) inside, if broken/ fragmented they may lodge in front of the needle valve seats blocking flow into carbs (efi?).
In '89 dt200's didn't have to many features that limited the motor running.
Do any lights on monitor Guage show up?
When you say " you use straight gas", do you mean you use only non-ethanol gas?

Post back when able what you find out.

[Charger1]

Rpm issues

Thanks solarman. I have not had a chance to look into all you recommended. Frankly, i'm probably not qualified to do most of the things you recommended. Regarding warning lights, there were none that came on while running the boat. As stated earlier, the boat ran fine as long as i did not try to get on onto the boat's pad. Beyond 1800 rpm, the motor bogged down and sounded real rough, like it was missing or sputtering badly. Up to 1800 rpm, the motor sounded and ran fine. I checked and cleaned the spark plugs and looked for any gan leaks and found none. For the past two years i have not used any gas with ethynol additives, and have been very careful when mixing my oil/gas using the 50:1 ratio. I will get out my owner's manual and see if i can accomplish some of the things you recommeded. My guess is, however, i'm going to have to bite the bullet and have a professional check it out. At least i know some of the possible problems thanks to you. Thank you for responding to my thread.

[Solarman]

It might be wise to ask of the mechanics you talk with, if they work on 2 strokes? Nowadays most work on the 4 strokes (much more money for them). Also, if they do work on 2 strokes, are they familiar with suzuki's? They are different than Johnson, evinrude, and mercury.

I would focus on testing those sensors and gear counting coils by the book (simplest). Then I'd look at/ disassemble the fuel pumps as I suggested to inspect them. Then post back on those items, and we can go from there. (All these are covered in the service manual).

Good luck.