GX Twin Relays

[1:54:51 PM] TEW Rep Eric: Thanks for using TEW Live Chat. How may I assist you today?

[1:56:45 PM] Matthew : Hey Eric, I have looked at the diagram for the Honda Adapter, and I can’t make any sense out of what you guys sold that to me for. What exactly does the adapter do? I have looked at the wires coming off the engine diagram which makes no sense to me, and if I knew exactly what those wires do I think I can get this thing up and running.

[1:57:23 PM] TEW Rep Eric: You are talking about the 53-1002-Twin relay?

[1:57:29 PM] Matthew : Yeah.

[1:58:20 PM] TEW Rep Eric: Do you have the GX wiring harness diagram from Honda?

[1:59:02 PM] Matthew : Yeah, its in the manual but I can’t follow it, it’s not very expanded and there are several options.

[1:59:11 PM] Matthew : With control panel, without, ect.

[2:00:14 PM] TEW Rep Eric: The only one that applies to you is the 17A Charge Coil without Box type. The rest are for other variations. You will still use the same legend for all the diagrams on the Honda side

[2:02:00 PM] TEW Rep Eric: The black wire from the engine comes from the coils. It hooks into the black wire from the relay. The black and yellow wire from the engine hooks into the yellow wire on the relay with the female connector.

[2:02:49 PM] Matthew : Okay, will I need to use the new Honda pigtail that came with the engine with the adapter relay? The reason I ask is because Scag has there own adapter on the wiring harness that fits into the regulator, I just have to make sure the new regulator wires match up with the old harness, if not, there will be cutting and splicing, which is fine, I just don’t want to do anymore of it then necessary.

[2:03:23 PM] TEW Rep Eric: The gray wires are for your regulator/rectifier for charging. The yellow lead with the male connector needs to be hooked to the load side of the keyswitch.

[2:04:13 PM] Matthew : Okay, yeah, I was trying to figure out where that yellow wire ran.

[2:04:15 PM] TEW Rep Eric: I don’t know anything about the Scag harness. I assume they have 2 wires ready to hook into the rec/reg, but not sure.

[2:04:46 PM] TEW Rep Eric: Click here for diagram

[2:04:54 PM] TEW Rep Eric: Have you looked at the diagram on this page?

[2:04:58 PM] Matthew : There is no fuel shut off solenoid with this engine right? that’s just an unused wire? That’s one other one that I don’t know where goes on the harness.

[2:05:17 PM] Matthew : not the scag harness but the honda one that came with the engine, it’s not the adapter either.

[2:05:24 PM] TEW Rep Eric: Yes, this engine does have a fuel shut off solenoid

[2:05:40 PM] TEW Rep Eric: That wire on the engine is black with a yellow stripe

[2:05:52 PM] TEW Rep Eric: It needs 12v to retract when the key is turned on

[2:07:26 PM] Matthew : okay, I think I have it decently figured out now, I just needed some clarification so I can cross check it with the existing harness. In the wiring diagram what is the red wire for? the load side of the keyswitch?

[2:09:19 PM] TEW Rep Eric: I don’t see a red wire in the Honda diagram for it. Where does it lead to or where is coming from?

[2:10:07 PM] Matthew : the one red runs from the starter tot he battery, there is a circle in the bottom right for a cluster of 4 wires leading to a “M”, what is that for?

[2:10:37 PM] Matthew : I am assuming the black rectangle block to the left is the adapter.

[2:11:29 PM] TEW Rep Eric: Okay, you are looking at our drawing. The M stands for Magneto, but the relay works around that because the Honda doesn’t operate like other brands. Yes, the black box on the left is the breakdown for the relay.

[2:13:13 PM] Matthew : Alrighty, I will try to get this to work right, I just don’t want to fry anything. Thanks.

[2:13:35 PM] TEW Rep Eric: Yeah, let’s not do that.

[2:14:34 PM] Matthew : So what is the point of the relay? What did Honda change that required that? I never quite understood why it was needed. Just might help me know what is going on with the wiring. That’s about all I can ask right now.

[2:16:28 PM] TEW Rep Eric: The way I understand it, they went from a ground to run instead of a ground kill. Backwards from everyone else. The relay supplies power to the carb fuel shut off solenoid, and allows the coils to fire, then kills the coils and shut the solenoid when power is taken away. Kills 2 birds with one stone.

[2:17:12 PM] TEW Rep Eric: Basically need to ensure 12v is not getting to the coils when you go to start it, and that 12v is getting to the solenoid when you go to start it, and when in the “run” position.

[2:24:20 PM] Matthew : Should be fun. Thanks Eric.

[2:24:30 PM] TEW Rep Eric: You’re very welcome


ITEM Part Number Yamakoyo # Description
1 36-1082 31-54 Recoil Starter
2 Starter Cup
3 12-1137 01-09 Cooling Fan
4 12-1131 01-37 Flywheel
5 32-1029 49-43 Oil Seal
6 12-1031 36-45 Cylinder Barrel
7 56-1038 33-12 Engine Stop Switch
8 30-1027 33-13 Oil Level Switch
9 27-1005 36-92 Governor Gear Assy.
10 12-1026 36-02Q Crankshaft Assy.
11 26-1003 50-11 Oil Pan Gasket
12 12-1093 36-117 Crankcase and Cover
13 30-1010 07-15 Oil Dip Stick
14 32-1029 49-43 Oil Seal
15 12-1039 45-01 Bearing
16 10-1003 36-21 Connecting Rod
17 38-1055 36-53 Piston Ring
18 34-1003 36-28 Piston Assy.
19 12-1086 36-11 Cam Shaft
20 12-1143 36-86 Valve Lifter
21 12-1046 36-80 Push Rod
22 12-1120 01-28 Control Assy.
23 14-1171 50-02 Head Gasket
24 17-1022 36-64 Valve intake/exhaust
25 24-1049 07-50 Fuel Tank Joint
26 91-1016 33-41 Spark Plug
27 19-1028 35-08 Muffler
28 19-1075 35-07 Muffler Protector
29 21-1001 07-10 Fuel Filter & Holder
30 24-1019 07-11 Fuel Tank Cap
31 24-1041 07-06 Fuel Tank Assy.
32 19-1042 35-01 Muffler Assy.
33 12-1053 36-73 Rocker Arm Assy.
34 12-1060 36-69 Valve Spring
35 12-1140 01-01 Valve Cover
36 12-1110 99-09 Cylinder Head
37 04-1011 49-10 Carburetor Assy.
38 04-1010 49-66 Carb-to-Filter Spacer Gskt.
39 14-1061 Carb-to-Spacer Gasket
14-1066 Spacer-to-Head Gasket
40 29-1054 33-04 Ignition Coil
41 02-1153 30-04 Air Cleaner Element
42 02-1001 30-01 Air Cleaner Assy.
43 12-1126 01-06 Fan Cover Housing