1999 Yamaha VMax 150 won't start

[tbull]

This is a motor my buddy and I picked up for next to nothing. Has good compression, good spark, carbs were rebuilt. The problem is it will not turn over. This motor kind of sat around for months, now we have started to tinker with it again. It also has 2 new fuel pumps, and fresh gasoline. If we manually put fuel into each cylinder by removing the plugs, little squirt of pre-mix fuel, and reinstall, it will turn over and run for a few seconds. What else could be causing this? Almost like fuel isnt reaching the cylinders? Thanks guys...

 

[tbull]

Re: 1999 Yamaha VMax 150 won't start

Forgot to add, the carbs flood when trying start repeatedly.

 

[rodbolt]

Re: 1999 Yamaha VMax 150 won't start

post the entire model number.
reread your post and you will see why it doesnt make sense.
wont turn over and wont start are widly different ani-mules.

 

[tbull]

Re: 1999 Yamaha VMax 150 won't start

Sorry, model number is P150TLRX

What I mean is the motor will not start unless you manually put fuel into each cylinder. It will run until that fuel is gone, and thats it. Otherwise it will not start, and when we keep trying it just floods the carbs.

 

[JB]

Re: 1999 Yamaha VMax 150 won't start

What, exactly, does "floods the carbs" mean.

From your description the carbs are not supplying fuel to the cylinders.

Go to the Engine FAQs Forum and do "Outboard won't start".

Let us know what you find.

 

[tbull]

Re: 1999 Yamaha VMax 150 won't start

I mean fuel starts to drain out of the carbs, so I thought that ment they were getting flooded. I will check the faq

 

[cousinabe]

Re: 1999 Yamaha VMax 150 won't start

Carbs got gummed up sitting around for the few months. Clean up your carbs.
Most likely the jets are clogged up and floats are stuck.

http://www.boats.net/parts/search/Yamaha/Outboard/1999/P150TLRX/CARBURETOR/parts.html

 

[aleutianwest]

Re: 1999 Yamaha VMax 150 won't start

If the fuel is coming out of carbs then floats must be stuck