Evening all
Having trouble tracking down an air leak on a 1989 Ryobi (Ryan half crank). It ran fine for a little while (only just got it from the tip shop), then started making a hissing or whistling noise from cold starts (that went away when hot). Now there is no noise from cold, but a really loud hiss (near scream) at all throttle openings when hot. When restarted, it takes 10-15 seconds to start whistling.
checked all the gaskets, put oil around them to see any air leaks, none noticeable. I'am trying to get the clutch off to access the main bearing to see if the seals are the issue.
I have tried the T20 (maybe 25), and it tore out the middle of the screw head on the clutch drum. I have put some wd40 in around the head and will try again in the morning, but I don't want to damage the head any more. Whoever installed the clutch must have used tonnes of loctite or something.
Bear in mind the clutch is in good condition, so angle grinding, etc isn't a option.
Have done it twice on near identical old Ryobis before without issues, but this one has stumped me - i just can't get a good grip on the retaining screw.
Any advice would be appreciated
Thanks
Tyler
