Can anyone help? It just started today. However the temperature did just drop below zero and I do have a walbro fuel pump which I know can be noisy. Thanks!

http://www.youtube.com/watch?v=qm7OjCstUSI

 

What's all that white stuff?

My Walbro has made a similar noise, like maybe twice, in several years. The first time it happened, it freaked me out bc it sounded like something was going to blow up. This was after a very long road trip, and my gas tank was very close to bone dry, so I figured it had something to do with that. I think I found a thread here where someone was saying that the Walbro has a high and a low speed setting, and that the high makes that noise.

After I topped off my tank the noise went away.

HTH, g'luck.