I just recently bought a used Invasion from a team member and I am having some problems with it. When I first got it the velocity was very irratic it would go from about 185 to about 335 and everywhere inbetween. After ALOT of shooting and messing with the LPR it kind of fixed the issue and kept working.
Second problem, when I got the marker home it seemed when I was dry firing it, it would have FSDO issues. I try to adjust the LPR in small increments but nothing seems to have fixed that issue.
The third and most serious issue now is that when I put a tank on the marker it will leak. I can't pinpoint exactly where since it's such a large leak. After I tried everything I could think of I took the Invasion apart completly and went through it and could find no issues with o-rings. However, the person I bought it from did mention that he put a "solenoid friendly" oil into the asa and dry fired it. So I did clean out a ton of blue oil gunk from the marker and had to regrease everything but it did not fix the problem.
Here is what I did thus far:
Cleaned and relubed regs and rammer.
Took marker apart and checked the valve and poppet, recleaned and regreased the valve. Left poppet dry.
Tried to increase hpr and lpr to see if the leak would subside.
Anyhelp you could give me would be most appreciated as I'm not sure what step to take next.