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Honda bf20d 2003 starter issues

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willie420

Member
Hi my honda bf20d is having starter motor issues it kicks over like a champ first go but when I kill the engine after an hour or so of use the starter has a hard time kicking over have to give it some throttle to catch and go it's starts then but struggles otherwise is the engine still drawing amps when not running . Is there a problem with the rectifier replacing the amps in the battery as I've heard there is no alternator in the bf20d. Any help would be appreciated should I clean all the terminals . Any links to after market starter motors would be appreciated serial no. 31200-zy1-802 / SMU0524

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I would suggest you clean all connections first from the starter to the battery to make sure they are all 100%.

Usually if your battery is not getting a proper charge, that shows up when you first start it cold.
 
While I wholeheartedly agree with NSDON's recommendations, I have to ask, how old is your battery?

If it' has increased internal resistance because of age or sulfation, it will be more difficult for the light duty 20D charging system to quickly restore capacity after cranking because you are correct, it's not an automotive type alternator. that's capable of rapid charging and supplying 40+ amps.

The 20D charging system only provides 12 amps peak load AND simultaneously provides power for the ignition system independently of the battery.

Other loads such as radio, depth sounder, lights etc...will exacerbate the issue

It might be time to take your battery to a big box auto parts store and take advantage of their free testing.

In addition to NSDON's points for loose connections and corrosion, the charging stator coil has 6 bullet style connectors for various wires that can also be a connectivity problem if loose or corroded. Not a common source of concern but something to be aware of, especially with saltwater use

Good luck
 
NSDON said:
I would suggest you clean all connections first from the starter to the battery to make sure they are all 100%.

Usually if your battery is not getting a proper charge, that shows up when you first start it cold.
Click to expand...
I'm going to run it tomorrow one last time for the winter ill clean all the connections after that it's just a strange one will kick over with good power even from cold but when it's ran for couple of hours and shut if off for casting when I try to start back up starter has very little power and seems weak have to give it some throttle to get going . But when I test my battery its still full
 
jgmo said:
While I wholeheartedly agree with NSDON's recommendations, I have to ask, how old is your battery?

If it' has increased internal resistance because of age or sulfation, it will be more difficult for the light duty 20D charging system to quickly restore capacity after cranking because you are correct, it's not an automotive type alternator. that's capable of rapid charging and supplying 40+ amps.

The 20D charging system only provides 12 amps peak load AND simultaneously provides power for the ignition system independently of the battery.

Other loads such as radio, depth sounder, lights etc...will exacerbate the issue

It might be time to take your battery to a big box auto parts store and take advantage of their free testing.

In addition to NSDON's points for loose connections and corrosion, the charging stator coil has 6 bullet style connectors for various wires that can also be a connectivity problem if loose or corroded. Not a common source of concern but something to be aware of, especially with saltwater use

Good luck
Click to expand...
I use my battery just for my engine alone I bought it in February just gone my battery box reads 12.9v very healthy battery all my trips are in freshwater . I'll have a look at all my connections after my last session tomorrow for the winter . My battery is a 44 amp hour brand new engine kicks over like a champ first go no problem I run for a few hours kill the engine for a while to cast and starter goes weak have to give throttle for it to catch its strange
 
If the starter is spinning but not popping up to grab the flywheel, the Bendix might just be gummed up with old grease. You can usually clean it with some brake cleaner and a light bit of silicone spray. Just avoid heavy grease - it actually attracts salt and grit, which makes it stick again pretty quickly!
 
I hope it's not the engine getting tight after running for some reason.

That can be caused by cooling water getting into a cylinder due to bad head gasket causing partial hydro-lock. The 20 has a pull starter. Pull it over when cold and then again after a run to compare how much effort is needed. If it's the same, then it's likely not an engine problem and you would go back to starter or electrical.

If it's harder to pull over after a run, it could be a problem with the engine. You would probably want to pull the plugs and inspect for possible water intrusion.

Other things that can make it tight after running would be:

Engine running hot.

The timing changing due to a loose belt.

The valves need adjustment.

Poor lubrication due to low oil pressure.

Sorry for the glum take but just giving information.

Hope you figure it out.
 
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