Wiring a WF

Frank Hein · Posted: Mon Mar 15, 2010 7:42 am Post subject: Wiring a WF

Going to mount the new WF to a new Arrow 4S this week. All the parts we need are in brown trucks somewhere in the US except for the electrical stuff.

Have a new B&S switch 557028 coming and we'll use a Rotax Yuasa battery and box. The wiring diagram on p. 12 of the WF manual is nice but doesn't give the details.

http://bsintek.basco.com/BriggsDocumentDisplay/default.aspx?filename=29jnvIX.-FzXFix2

Where's a clever place for the switch to be mounted and do we need to fab a mount? What gauge wires and what fuse to put where?

I've been through 4cycle.com and as usual there is info but isn't gathered into a concise answer. One suggestion is to use a rider mower wiring harness.

There wasn't any info on ekn so maybe some authority could get it down here in the B&S forum. A few clear photos would be the icing on the cake. Thanks
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Frank
Arrow AX9-4S / Briggs World Formula

John Matthews · Posted: Mon Mar 15, 2010 11:37 am Post subject:

It's pretty straight forward, hot lead from the battery goes to the threaded lug on the solenoid, ground the battery on your motor mount or engine case. Starter button is a momentary (normally open), one side goes to the same lug as the battery, the other side goes to the spade terminal on the solenoid.

Use good quality stranded 8 or 10 gauge wire for the battery cables, 14 gauge is plenty for the switch. You can mount the switch anywhere you like, you could even mount one next to the kill button on your motor plate.

If you're heavy like me and your club doesn't require it you might just want to take the starter off and pull start the thing. They start pretty easy, and unlike 2 strokes they rarely stall when you spin out. It's quite a bit of weight you can easily remove without any negative effect.

Sorry, no pictures but let me know if you have any other questions.

Cheers,
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John Matthews
Heartbeat Power, LLC.

Bernie Lacotta · Joined: 21 Mar 2006 Posts: 168

michael schorn · Posted: Tue Mar 16, 2010 7:52 am Post subject:

Man I typed out a whole response and looks like it didn't post. Must clicked preview instead of submit.
Anyway John explained it pretty well.
The battery you are wanting to use may not last that long as it is I believe a 9.0 ampere hour battery.
The Briggs starters use a bit more juice than the Rotax starters so you may want to consider a higher amp rating battery if you want to use the starter. Or you will need to charge it on a regular basis.
The bueaty of the WF is if the battery is dead, just pull start.
Up in the Northwest Most everyone does not run the battery or starter.
The beauty of it is if these things almost always start on the first pull or two. Even my ten year old can start me.
A good portion of the drivers don't need extra ballast anyway and for those that do like to put weight in different places.
There a couple of drivers that use the electric start and are happy with it.
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Frank Hein · Posted: Tue Mar 16, 2010 8:21 am Post subject: Wiring a WF

Todd P Weaver · Posted: Tue Mar 16, 2010 9:38 am Post subject:

Frank,

I took the starter off to save weight. I'm 200#s.

regarding the ease of pull starting, Usually it will take a little choke and a couple pulls the first time you start it that day. After the first start of the day, I've found it to be no choke and one pull starting for the rest of the day.

When I'm on the grid, I start it about a minute before I go out to let it warm up.

Todd
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John Matthews · Posted: Tue Mar 16, 2010 12:00 pm Post subject: Re: Wiring a WF