2014 4.3 liter TKS bogs after running 35 knots for 45 minutes.

[coolbucket]

I have a 2014 hurricane 187 deck boat. It has a 4.3 l TKS engine with very low hours. I just had the carburetor rebuilt and the timing set. I took it out yesterday memorial weekend, and it ran like a scared rabbit 35 minutes down the river here in florida. I idled around The Sandbar for a while stayed there for an hour started it back up came back up for 35 miles and started idling. It idled for like in a slow cruise for about 10 minutes and then I went to gun it and it bog down. Every time I went to accelerate it bogged down.

 

[coolbucket]

I forgot to add that I feel that it may be the fuel water filter. I don't know if it has been changed or not because I just bought this boat.

 

[Scott Danforth]

Look at the accelerator pump on the carb

 

[alldodge]

Fuel issue
Open the gas cap and listen for air being suck in. If you hear air then your drawing a vacuum in the vent because the vent is clogged

If not hearing air, check to see if you get a squirt of gas when throttle moves. Might also be fuel pump is weak, antisiphon valve on the tank is restricted, fuel filter is clogged

Dump the filter contents into a clear container to see if there is anything but clean gas

 

[coolbucket]

Fuel issue
Open the gas cap and listen for air being suck in. If you hear air then your drawing a vacuum in the vent because the vent is clogged

If not hearing air, check to see if you get a squirt of gas when throttle moves. Might also be fuel pump is weak, anti siphon valve on the tank is restricted, fuel filter is clogged

Dump the filter contents into a clear container to see if there is anything but clean gas

Thanks, I'll try that. I don't know how long the boat has been sitting but I put in fresh non-ethanol about 10 gallons in before I went out. It had three quarters of a tank of gas. I did put in some sea foam early last week.

 

[Bondo]

I forgot to add that I feel that it may be the fuel water filter. I don't know if it has been changed or not because I just bought this boat.

Ayuh,.... Welcome Aboard,..... You should have started there,.....
Hopefully, you haven't filled that newly rebuilt carb fulla crap again,....

As AD says, check it's contents in a clear container,....

 

[coolbucket]

Ayuh,.... Welcome Aboard,..... You should have started there,.....
Hopefully, you haven't filled that newly rebuilt carb fulla crap again,....

As AD says, check it's contents in a clear container,....

If that happened, what to do about it? I find it awful puzzling that I ran strong as a rabbit for over an hour and then stopped and idled around and then took off again and it ran like crazy that there would be stuff in the carburetor again.

 

[coolbucket]

I think one of the smart things for me to do is put in a new fuel water separator because I don't know when the last time it was changed. Am I right to think that if there's water in that getting into the carb it's going to act that way?

 

[coolbucket]

I think one of the smart things for me to do is put in a new fuel water separator because I don't know when the last time it was changed. Am I right to think that if there's water in that getting into the carb it's going to act that way?

 

[coolbucket]

I found that there are minority of mechanics out there that say don't use seafoam. But the majority of people in mechanics out there say it works great. I've used it my other boats and it cleaned them right up and made them run smooth as a kitten. So I don't know what to do regarding the sea foam. Some say pour it in the carb and it eats up the crap.

 

[alldodge]

Seafoam your boat u decide. If it's drawing a vacuum and u hear air then after air is sucked in it will run fine until it draws another vacuum

 

[coolbucket]

I just ran the boat and open the gas cap and listen for any air I did not hear any.

 

[Bondo]

If that happened, what to do about it? I find it awful puzzling that I ran strong as a rabbit for over an hour and then stopped and idled around and then took off again and it ran like crazy that there would be stuff in the carburetor again.

Ayuh,.... You rebuild the carb again, then feed it clean fresh gas,....

 

[coolbucket]

Shouldn't I replace the fuel/ water separator first, empty the tank, fill it with non ethanol THEN rebuild the carb?

 

[coolbucket]

Maybe the Carb is fine.

 

[coolbucket]

The Carb was rebuilt last week.

 

[coolbucket]

How about the Anti- siphon valve? Maybe I should just get that replaced too?

 

[Bondo]

Shouldn't I replace the fuel/ water separator first, empty the tank, fill it with non ethanol THEN rebuild the carb?

Ayuh,.... That might be what you should have done,.....
Now, start by examinin' the contents of the fuel filter, 'n see how much crap is in it,.....

 

[dingbat]

Step 1 - check fuel filter for water…..

 

[coolbucket]

What's everybody thinks of this?
As simple as this sounds you always start by running it off of a different fuel tank, like a small plastic portable tank. Half the time there isn't anything wrong the motor itself, but rather something wrong with the boats fuel system. This can be a pinched or collapsing fuel line, bad or old gas, or a bad anti siphon valve. Marine engines are very sensitive as to the quality of the fuel, and if any part of it is over 90 days, the fuel itself is always going to be suspect. This is a pass or fail test, and the engine is either going to run better or it is not. If it does run better, on this portable tank, first change the anti siphon valve and retest with the engine hooked back up to the boats fuel tank. If it goes back to running poor on the boats fuel tank, that tank will need to be pumped out. Bad anti siphon valves are a common problem, when they go back they create a blockage and restrict the amount of fuel that flows to the engine