1970 60HP Johnson - Question about the rectifier

[needwarmth]

Can a bad rectifier cause the main 20 amp fuse to blow??? The tach functions fine. Trying to find the cause of the fuse blowing after startup. It can run for 1 minute and then blow, or sometimes as much as 5 minutes and then blow. VERY frustrating!!! Any help would be most appreciated!

 

[F_R]

Re: 1970 60HP Johnson - Question about the rectifier

Look for something else. The charging circuit does not go through the fuse.