Blowing valve out

[NMB]

Hi I'm in need of a little advice,I have an '81 85AET which I am rebuilding.At the moment I am working on the tilt trim and when I lower the the bracket,not attached to mid section yet,it blows out the main valve on one side,the circ clip ain;t holding it.That tells me the track for the clip is worn down,new clip,.So my question is,is it feasible to use a small wheel,like on a dremmel,deepen the recess and install a larger clip,or is there another method?Doing my best to keep the bits out of the valve housing Any help very much appreciated.

[boats.net]

We don't have any information on that model but the main valve should be threaded and is then threads must also be stripped out.

[NMB]

Oh ,I can't see any threads on the valve,just a couple of o rings,it's a 6H1 system and part # 37 on this schematic, 1984 90ETLN Yamaha Outboard POWER TRIM & TILT COMPONENT PARTS Diagram and Parts . The manual I use is the Seloc '84 - '94 3 cyls from the 'States, and it shows the trim system the same as the one on my older European Yamaha.It's becoming a pain this piece of junk.I'll go with deepening the groove bigger circ clip/snap ring and hope for the best and if it doesn't work it going to the metal recyclers.Thank you for the response,it's very much appreciated

[NMB]

I costed the individual prices for a total seal kit and after my ever patient wife jumped started me with the defibrillator,,I started to wonder if there is a kit,cheaper full seal kit,as I thought I would do all the seals at the one lift,does anyone have a part number for it.If not I will do one ,ram,valve at a time over a period of time.
Engine drops quickly with manual release valve closed,so I'm thinking seals,starting with the manual release valve seals.It's not leaking at any of the rams that I can see.
If I'm wrong,which would not be unusual,could someone please point me in the right direction.Thank you.

[rodbolt17]

6H1 unit drift down.
look at,up main valve,up relief valve,manual release valve,trim piston orings or the free piston in the tilt cylinder.

[NMB]

Thank you.I'll get to it.