Problem with engine

[SColby]

I was wondering if anyone has an answer to why my engine dies.

The problem I am encountering is that when I get the thing started it idles well and runs ok when I start out. Once I get going and start to get on the pipe it dies. Do I need to go richer? I am running 65% with a modded 3.5 and a magic muffler for a pipe. I think I am at about 4 turns with the needle valve. Any help or suggestions would be much appreciated.

Thanks,

Steve

 

[Jerry Dunlap]

I suggest opening the needle-valve until the engine runs rich on the water and then begin to needle it in.

You didn't mention the size propeller you were running. Too large a prop will not allow the motor to unwind.

JD

 

[SColby]

Sorry,I am running an octura x437/3.

Thanks Jerry, I plan on heading to the lake again this weekend so I will give it a try.

 

[Jerry Dunlap]

The X 437/3 should work fine. Just get that "puppy" running blubbery rich.

Also, if it's a used motor - there could be some issues with bearings.

JD

 

[SColby]

It is a used motor. I bought this boat used quite awile ago and it was used as a race boat. I did have it running pretty decent last year running on 35% but have changed this year to the 65%. Thanks again.

 

[nitrotoys]

If it ran pretty good last year with 35% and you are running 65%, You need to open up the needle a good 1-2 turns.

You want them bubbery rich on the beach, and when you throw it in, with the load on engine it will lean out some as well.

Tom

 

[SColby]

Thanks Jerry and Tom. That is kind of what I was thinking but wanted to see if there was something else i should do. I will have to open the needle up another whole turn from where I was with the 35%. So I will be around 5 turns out. Does this seem like a lot? Even so i will give it a try and see what happens.

Thanks for the help so far.

 

[snowdog-2112]

Scolby,

Start at 6 turns open and lean it down from there. This way you won't have to worry about it die-ing on you on the back stretch.

Snowdog

 

[SColby]

Sounds good. Thanks all I will let you know how it went after the weekend. Heading to the lake to try and finish tweaking things before the Fun Run.

 

[SColby]

Jerry, Tom, Snowdog.........

Thanks for the suggestions. I ended up opening the needle to 7 turns. Ran none sto but would not lean out. So I started to turn it in slowly until it did. I am now setting at about 6 1/2 turns and it is running really well. Almost as good as it did when I first bought the boat almost 10 years ago. It actaully wants to blow off which I have not seen since then either. Now i just need to work on the trim a fuzz and everything will be all set. Thanks again for all the help.

Steve

 

[snowdog-2112]

Jerry, Nitrotoys,

Another successful mission!

Snowdog