Carb issue Need help!!!

[arffaz]

I recently purchased a boat with a Suzuki DT-50 on it. The motor would not start when I very first got it, I did a quick carb cleaning with canned carb cleaner and can now get the motor to start in gear only. The throttle must be pushed about 3/4 of the way forward to get the motor to start and idle. When the motor is placed in neutral it dies. I sprayed starter fluid in both carbs with the engine idling and it will die when I spray it in the top carb, but will continue to run when sprayed in the bottom carb with no change in the RPMs. Does this mean that the bottom carb is not running? Does it need a better cleaning?

Secondly, When I apply full throttle the prop spins very slowly, there is a lever under the flywheel that when pushed forward will actually increase the prop speed. Does this lever advance the timing? Seems that it is not be actuated enough by advancing the throttle forward. Also if i shift the motor into reverse then the prop will spin at speeds that seem normal... then I engage into forward and the prop will spin at normal speeds coming from reverse...answers?

Thirdly when I apply the suction ear to the motor I will get water from the exhaust port and prop (this year model does not have a telltale) but when I put the motor in to a bucket of water I now longer get water from the exhaust port?

 

[arffaz]

Re: Carb issue Need help!!!

***UPDATE***

I messed around with the motor this afternoon and got it to run and start in neutral. The motor shifts into gear both forward and reverse now. I used a cut in half 55 gallon drum this time and now the water pump is pumping water out the exhaust.

Problem now is the engine is only running on one cylinder. When I pull the bottom plug the engine continues to run with no decline in rpms. Compression test comes back with 130 in the top (running cylinder) and 125 in the bottom cylinder. Spark test come back good with over a half inch jump on the spark test.

I am guessing the lower cylinder is not getting fuel. when the engine is running i feel air moving in the top carb but nothing in the lower carb. what should I do next. rebuild carb again? replace reeds?

 

[stylesabu]

Re: Carb issue Need help!!!

did you remove bowls?

 

[robaloroger]

Re: Carb issue Need help!!!

***UPDATE***

I messed around with the motor this afternoon and got it to run and start in neutral. The motor shifts into gear both forward and reverse now. I used a cut in half 55 gallon drum this time and now the water pump is pumping water out the exhaust.

Problem now is the engine is only running on one cylinder. When I pull the bottom plug the engine continues to run with no decline in rpms. Compression test comes back with 130 in the top (running cylinder) and 125 in the bottom cylinder. Spark test come back good with over a half inch jump on the spark test.

I am guessing the lower cylinder is not getting fuel. when the engine is running i feel air moving in the top carb but nothing in the lower carb. what should I do next. rebuild carb again? replace reeds?

You need to pull the carbs off and disassemble them. Soak them in carb cleaner(autozone sells gallon) for an 1/2hour to an hour then rinse in soapy water then rinse with clean water. Blow out all passages with compressed air. Repeat if they are really dirty. If there is build up in any jets you can get some wire and feed it through to unclog. Most of the times if you are really careful and do it slowly you can reuse the gaskets if you are trying to save on money. When taking apart make sure you use good screw drivers. If you pull the spark plug out and hold a piece of paper to the spark plug hole while running the motor it should get wet from gas. To prime your motor do not use starter fluid. Use premix gas in a spray bottle. Spraying carb cleaner in the carbs doesn't really do anything. You got to get in there. Do 1 carb at a time so if you forget where something goes compare it to the other. Make sure that lever below the flywheel moves freely. Might have to grease it a little..Good luck..