Join Date: Aug 2018
Location: Lowell area, MA
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 25 Post(s)
Does the starter crank the engine more-slowly than expected? Or is the speed OK, and it just takes a while to actually catch & start?
I'm assuming that it's cranking too-slowly. If charging the battery improves things, then my thoughts (nothing earth-shattering) would be:
- battery is discharging between uses, could perhaps be avoided by leaving a trickle-charger connected
- battery has degraded (but you said it passes a load test)
- starter motor is failing
- poor electrical connection somewhere reducing voltage to the starter while cranking
- excessive compression
For the electrical connection, is it possible to use jumper cables to connect directly from the battery to the starter motor? If the starter suddenly turns more quickly, I'd look for a bad connection. You could also try checking the voltage at the starter while cranking, vs the voltage at the battery while cranking. That will tell you how much voltage you're losing in the connections.
For compression, you adjusted the valves. Is the compression release working properly? When adjusting the valves, if you can rotate the engine by-hand (not sure if it's possible with something this size), can you see the compression release nudge the valves open?
And if the cranking speed seems good, but it has to crank for a while before it starts, is the choke working properly? Is there any sort of priming function?