This is powered by a 8HP B&S 190402-272041, which has no electric starter nor charging coil, but has a toothed flywheel for an optional electric starter motor. Some models had electric starter upgrade kits available; I have to assume that the 120V (AC) starter kit was popular, so they furnished the toothed flywheel stock.
Modern snowblowers have various ways to quickly move the discharge chute left/right/forward etc., but this era used a crude worm gear setup that is hand-cranked to swivel the chute, and the crank is quite low, not very ergonomic, and if you're using a snowblower much you are constantly having to move where the blower moves the snow, so this hand-crank is a primary human-machine interface. People have moved the lever higher via cutting the shaft and inserting a u-joint etc, but you're still hand-cranking it. Here's how one person modified theirs:
[ref: https://www.snowblowerforum.com/threads ... st-1778653]
More modern approaches involve installing an electric motor and switchgear. Notes/ideas on doing something like this on mine follow.
The basic circuit:
[ref.: http://www.robmeyerproductions.com/bows.html]
Modified circuit. Below, I've changed the above circuit slightly. The limit switches now ground the relays' coils, which eliminates one wire in the harness to the limit switches. And a Transient Voltage Suppressor is added (D1), because that motor is going to want to arc the relays' contacts without one.
Gearmotor: Car seat motor (surplus, new), Amazon B005IR1NBA, $38, around 190 RPM with ~7/16" shaft that's actually a linear actuator shaft. About 1.5A with minimal load. Others have successfully used this gearmotor for powering their chute swivels on Honda HS928 etc.
[ref. https://www.snowblowerforum.com/threads ... els.80393/]
Connector/Pigtail for Gearmotor: AC Delco PT3156 (replaces PT159), $17. The gearmotor has 3/16" wide flat male quick-connector terminals. I assume one could obtain mating 3/16" female spade terminals, but I wanted better mechanical rigidity.
[later]
The connector can be purchased ala carte.
Packard->Delphi->Aptiv 12064749 mating connector is a Metri-Pack 480 Series (unsealed).
Housings:
Amazon (pack of (10)), $12 (shipped)
eBay (lot of (10)), $8 (shipped)
Mouser 829-12064749, $0.72 ea. (plus shipping)
Terminals:
The terminals come in a variety of wire sizes; one of the part Nos. (for 12-14 AWG) is Aptiv 12065892-L, Mouser 829-12065892 , $0.35 ea. ((2) req'd.)
Switch, DPDT Momentary: K4 13-211ST "Triple Sealed" DPDT (ON)-OFF-(ON), 20A, screw terminals. While I don't need DPDT (SPDT would be fine), this is what I could order in a reasonable timeframe at a reasonable price.
Bling for this switch: K4 Switch_Cover, K4_19-531. Switch lever cover for 04-1300 Series switches, hot green. Their stock photo looks kinda dirty, eh?
Limit switches: (reed switches), Littelfuse 59140-4-S-02-A. These are NC reed switches that open when a magnet gets near a target zone on the switch. They sell their own magnet separately, but I am thinking I'll epoxy generic magnets to the swiveling chute. One switch & magnet pair for each direction's endpoint.
59140-4-S-02-A breakdown
- 59140 =Switch Series
- 4 = Type = SPST, NC
- S = Sensitivity = .457" (using 57140 actuator). This is the most sensitive of the four options, with the least sensitive being about .248" range.
- 02 = Leads (wires) length = 11-3/4"
- A = Tinned leads
Relays:: Panasonic ACT512. This is an especially nice find, as it's TWO Form C relays in a single package. Two identical, discrete relays in a single module. Solder lugs, though. Datasheet
These ACT512 relays are tiny.
Transient Voltage Suppressor: LiittleFuse P6KE16CA TVS DIODE, 600W, 16V, DO-15 (10 pieces). This is a bidirectional zener diode (pair of zeners) in a single package. It damps the inductive voltage spike of the motor when the relays open, which in turn should extend the relays' contact life significantly. Good circuit design practice for mechanically switched DC inductive loads.
[ref. https://electronics.stackexchange.com/questions/318013/snubber-diodes-for-a-dc-motor-with-2-relays/318078#318078 , Fig. 3]
Connectors.
Molex Connector Lot (5), (2-circuit), 14-20 AWG, .093” w/lock
Molex Connector Lot (3), (3-circuit), 14-20 AWG, .093" w/lock