Electric: 25A fuse for starter relay-kit (starter interruptus)

Sharing experience:


About a year ago, i installed a starter relay-kit, own-rebuild from MPH, because of starter interruptus. Works beautiful.

This spring the 20A fuse from the relay-kit blows several times. Checked wiring, starter, etc. - same issue.
I decided to install a 25A fuse and until now, the GRiSO starts again. Seems, the problem is solved.

Someone, who had the same problem?

Markus[You must be registered and logged in to see this image.]

I have had the MPH kit installed for the last 6 years. It came with a 15amp fuse in it which would blow about every 6 months. At the advice of some of our experts here, I went to a 20amp. I’ve had it blow maybe once or twice in the last 2-3 years.

25A covers the "odd" occasion when the solenoid is a bit slow pulling in. Good Job.

be careful upsizing fuses as you want to make sure you don't exceed the ampacity of the wiring itself. in theory, if your fuse is rated at a higher current than your wiring can handle,  you could melt the wiring or start a fire before the fuse blows .
you could also look into the fuse specifications. using a time delay or slow blow fuse instead of a fast acting fuse will  buy you some additional time before the fuse blows.

You are right - i really thought about putting in a 25A fuse more than twice, because of upsizing. Also my father told me about these different sort of fuses - thanks for reminding me a second time, Chris W.