newgenjdcollector
Member
I'm looking into eliminating the aneroid on the 7520 to get a little more bottom end and have a few questions. I understand how the aneroid works but not sure on the best way to eliminate it. I began disassembly of it and have the entire neck/plunger assembly off. I chipped the neck housing so I'm hoping I can make a cover plate and leave the whole thing off rather than finding a replacement and putting it back on.
Anyhow, looking inside I see a cross shaft with a small finger on it.
I can't really tell what the finger actuates but when cross shaft (ie start button) is pushed in, the finger also slides over. I know this allows more fuel at start-up. Not sure how it does this by just sliding over but they don't start worth a crap if that button doesn't operate.
I know that as boost is built, the diaphram/plunger pushes down on that finger and as boost decreases, the spring helps pull the finger back upward.
My question is, can I delete the entire plunger and if so, can I just push down on that finger and leave it or do I need to keep the plunger intact in order to keep the finger in a fixed position. I'm worried that finger might move on it's own if nothing's holding it. I also don't want it to affect starting.
Anyhow, looking inside I see a cross shaft with a small finger on it.
I can't really tell what the finger actuates but when cross shaft (ie start button) is pushed in, the finger also slides over. I know this allows more fuel at start-up. Not sure how it does this by just sliding over but they don't start worth a crap if that button doesn't operate.
I know that as boost is built, the diaphram/plunger pushes down on that finger and as boost decreases, the spring helps pull the finger back upward.
My question is, can I delete the entire plunger and if so, can I just push down on that finger and leave it or do I need to keep the plunger intact in order to keep the finger in a fixed position. I'm worried that finger might move on it's own if nothing's holding it. I also don't want it to affect starting.