(1993 225 90 deg).<br /><br />I want to service the pressure relief valve grommet but noticed the housing is tucked in underneath the CDI unit and just barely above the level of the bottom housing. I just did the thermostats (see other post) and there was a lot of work cleaning off old gasket but the tstats were accessible as it gets. Any hints for getting at this thing - should the CDI unit be moved out of the way? Looks like replacing grommet could be awkward, not to mention gasket residue scraping = or is there some solvent that will automagically clean it?