It started 3 times this morning while hot. Then I went home for lunch & 30 minutes later, no start. It tries then sputters, then cranks but won't fire. If I pump the pdal hard, sometimes it will start. I talked to a different shop mech. he said possibly the ck valves in the pumps. I couldn't find anything on a cold start relay in the shop manual. Hopefully this guy will diagnose instead of changing parts.