motor wont run in water

[rockyrude]

Re: motor wont run in water

Good going !! Sounds like you've got a "lean sneeze" spend the time to adjust those carbs right. Lean means less oil going through the motor means short life.

 

[chermac01]

Re: motor wont run in water

How do I go about adjusting the fuel flow. I don't know that I can on my year of motor?

 

[rockyrude]

Re: motor wont run in water

You have an adjustment on each carb. Look in the top secret file for the procedure.

 

[boobie]

Re: motor wont run in water

Those carbs have fixed jets for the idle sytem. No adjustment, just cleaning and proper sync & link.

 

[chermac01]

Re: motor wont run in water

So I took my boat to the water today to test the motor and it started up right away and idled really well for 5 to 10 min. I proceeded to take it to half throttle and it ran like a champ but as soon as I throttled back to neutral it died and never started back up. Any ideas?

 

[rockyrude]

Re: motor wont run in water

Out of gas? Been there done that.

 

[sutor623]

Re: motor wont run in water

So I took my boat to the water today to test the motor and it started up right away and idled really well for 5 to 10 min. I proceeded to take it to half throttle and it ran like a champ but as soon as I throttled back to neutral it died and never started back up. Any ideas?

I have had this issue. Did the gas and gastank come with the boat? I bet you have water in the gas. One good rain with the vent cap open and voila. Put some Iso heet (2 cycle kind) in the gas and shake it up. Let it set for a few days and try again. It is worth a shot. If this doesnt work, like everyone on here is saying you have to rebuild the carbs and fuel pumps, and check your ignition system with a volt-ohmeter to make sure your ignition system is not faulting out when it gets hot.

 

[chermac01]

Re: motor wont run in water

thanks sutor. It has good gas in it. I am guessing it is a problem with the ignition system so I am going ahead and checking it

 

[eclark53520]

Re: motor wont run in water

Sounds like a fuel problem to me.

I would rebuild the carbs anyway.

 

[sutor623]

Re: motor wont run in water

thanks sutor. It has good gas in it. I am guessing it is a problem with the ignition system so I am going ahead and checking it

Are you sure you want to go that route? Seriously man if you just bought that boat you dont know any history. You need to either do the carb rebuild or have it done. If you want, google CDI troubleshooting and check ignition components. Then if they check out address the carbs. If you are running lean (which we all seem to think that you are) then you are not getting enough fuel/oil to the cylinder, which leads to high temps, scored cylinder walls and melted pistons.

 

[chermac01]

Re: motor wont run in water

Are you sure you want to go that route? Seriously man if you just bought that boat you dont know any history. You need to either do the carb rebuild or have it done. If you want, google CDI troubleshooting and check ignition components. Then if they check out address the carbs. If you are running lean (which we all seem to think that you are) then you are not getting enough fuel/oil to the cylinder, which leads to high temps, scored cylinder walls and melted pistons.

I am going to rebuild the carb and I have already ordered the parts. Just trying to check what I can until I receive what I ordered.

 

[rockyrude]

Re: motor wont run in water

Did you not rebuild them fixing the float problem? I'd be leaning towards water in the fuel, ignition second. Just to be sure test for spark, if there is then it's fuel.

 

[chermac01]

Re: motor wont run in water

Did you not rebuild them fixing the float problem? I'd be leaning towards water in the fuel, ignition second. Just to be sure test for spark, if there is then it's fuel.

The only reason I did not rebuild them when I fixed the floats is because I have not gotten the rebuild kit yet(ground shipping takes forever). I guess I am just to Impatient. Ha Ha. I know that patience is important with motors. I am going to treat the fuel and hopefully my carb rebuild kit will be here sooner than later!

 

[rockyrude]

Re: motor wont run in water

Then that also explains better your "lean sneeze" a dirty jet can cause that easily. Also, just to be sure, put a spark tester on it so you are certain you have spark.

 

[chermac01]

Re: motor wont run in water

Then that also explains better your "lean sneeze" a dirty jet can cause that easily. Also, just to be sure, put a spark tester on it so you are certain you have spark.

will do. I will be sure to let you know how it runs after I rebuild the carbs

 

[sutor623]

Re: motor wont run in water

I bet you have water in the gas.

thanks sutor. It has good gas in it. I am guessing it is a problem with the ignition system so I am going ahead and checking it

I'd be leaning towards water in the fuel, ignition second.

Nope already ruled water out Rock.

 

[chermac01]

Re: motor wont run in water

Alright well, I have done a carb rebuild but still the same problem remains. I think I am getting a week spark off one cylinder which I think explains a lot of my problems. Besides checking the spark by turning the motor over is there a more accurate way of checking the quality of the spark I am getting? when I removed the spark plug from the cylinder that is giving me a weak spark the plug was coated in fuel therefor only intermittently sparking if at all. I guess what I am asking is there any way to know if its the plug or the plug-wire or if its something with the electronic control? Or just replace the cheapest and work my way to the more expensive?

 

[sutor623]

Re: motor wont run in water

Depends really. If you can tell you have a weak spark there are a few things you can try. One is cutting the boot end off of the plug and reattaching it (If it is long enough) Cant tell you how many times I have had issues right at the wire by the plug. Also you could just get some new plugs. That has fixed misfires for me. But you have the right idea, start at the plugs and work backwards.

 

[chermac01]

Re: motor wont run in water

Alright Its not an electrical problem because I have a good spark on all 4 cylinders! The motor starts to turn over but once the starter stops it stumbles for a second and then stops. This is all while out of the water. I have no idea what the issue could be. Any ideas?

 

[rockyrude]

Re: motor wont run in water

First, you had a "reasonably" decent running motor before the carb rebuild. When you say that it starts to turn over, do you mean it tries to start but doesn't? Did you do a complete rebuild, pulling all of the welsch plugs and cleaning all of the passages? Considering it at least ran prior to the rebuild, this is where I'd investigate first.