Hay all,
Looking for a little advice, I just finished working over a 371XP, milled cylinder to .020, adjusted timing on the exhaust port, squared up the exhaust and intake, put the Walbro 12B on it, set it fat for the tuning session. It warmed it up, then I set the low speed, and slowly leaned out the high. It 4 stroked up to 15-16 thousand and the I heard a pop and plastic started flying.
Looking over the remains, I think the plastic "jet" next to the flywheel started vibrating and hit the fan, or a loose starter rope got sucked into the flywheel. The second picture is a mod of the jet. I trimmed it down and used some silicon on it for better support.
Any ideas?
Looking for a little advice, I just finished working over a 371XP, milled cylinder to .020, adjusted timing on the exhaust port, squared up the exhaust and intake, put the Walbro 12B on it, set it fat for the tuning session. It warmed it up, then I set the low speed, and slowly leaned out the high. It 4 stroked up to 15-16 thousand and the I heard a pop and plastic started flying.
Looking over the remains, I think the plastic "jet" next to the flywheel started vibrating and hit the fan, or a loose starter rope got sucked into the flywheel. The second picture is a mod of the jet. I trimmed it down and used some silicon on it for better support.
Any ideas?