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post #1 of 14 Old 08-06-2019, 01:00 AM Thread Starter
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4514 and 4518 combination relays

NEW combination relays are now available for RT5000/5013, 4514, and 4518 honda no spark cdi combination relay | 4514 | 4518 | 5013 | 5011 | 5518 | 5013 | 6522

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post #2 of 14 Old 08-06-2019, 11:35 AM
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Re: 4514 and 4518 combination relays

That's nice to know... My 4518 has a CDI issue, and to get it started, I have to push or pull on the CDI connector in order to get it started.

Soon to come JD 216 16hp Kohler K341 with attachments
1992 Honda 4514 14 hp GX360K1 twin liquid cooled engine hydrostatic (IN PICTURE)
1990 Honda 4518 18 hp GX640 2 cylinder liquid-cooled engine hydrostatic
1995 Craftsman GT6000 17hp Kohler Magnum Twin 6 speed
1978 Massey Ferguson 1655 18 hp Onan twin swap pedal drive hydro
(And a couple more that come and go)
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post #3 of 14 Old 08-07-2019, 05:32 PM
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Re: 4514 and 4518 combination relays

I see so many people indicating issues with these things. Isn't there a way to simply "bypass"? Honestly IMO electronics and lawn equipment don't belong together LOL. Anyway it's one of the things causing me to be leery of unloading my Simplicity Sovereign. What electronics there are consist of simple off the shelf relays and switches and can easily be bypassed albeit with less safety features but at least you can get the grass cut
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post #4 of 14 Old 08-07-2019, 10:11 PM Thread Starter
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Re: 4514 and 4518 combination relays

these electronics that fail are 30 years old! Hhow long do you think they should last?
I make new or repair all electronic parts for all Hondas worldwide, and that is a LOT.
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post #5 of 14 Old 08-08-2019, 07:58 AM
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Re: 4514 and 4518 combination relays

I expect more. But, that's me. Seems a shame a piece of equipment built to last that long should have electrical parts that do the same or at least are available. In any case other than some body like aforementioned company repairing/rebuilding are there workarounds?
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post #6 of 14 Old 08-14-2019, 10:50 PM Thread Starter
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Re: 4514 and 4518 combination relays

Repair is cheap, not advisable to tamper with safety interlocks. Repairs should last 20 years or more.
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post #7 of 14 Old 08-20-2019, 01:50 PM
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Re: 4514 and 4518 combination relays

Hello Tom. I have an RT5000 that has been developing a problem for some time now. It would be working fine and then lose engine speed, loudly backfire, and then continue operating normally. This has happened about 10 times in the last few years. Yesterday I loaded it onto my trailer to go mowing at my land near a lake. Unfortunately it would not start again. I returned home and discovered there is no fire at the spark plug. Today I got out my shop manual and did some testing with my ohmmeter. The exciter coil was in the specified range of 234-286 at 262 ohms. The pulser coil (range 30-36 ohms) reading was 38. The primary side of the ignition coil read 0.3 (spec is .16-0.2). The secondary side read 4.5 Kilo ohms (range 3.7-4.5). The CDI unit...well I only got a few readings and they were out of the specified ranges found in my shop manual. Does any of this info mean anything to you? Any help would be appreciated. This tractor should NOT end up being used as a boat mooring anchor! Thanks in advance.
Haley Graham
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post #8 of 14 Old 08-20-2019, 01:58 PM
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Re: 4514 and 4518 combination relays

On my 4518, I had to whack my CDI module on the frame for a couple years to get it started. I bought a new module from Tom on ebay and it's been a joy to have quick starts again. It is a HIGH QUALITY product (I got the reproduction part, not a rebuilt one.) So far, my combination relay is working OK. I for one, really appreciate someone taking the time & investment to pick up the reins for Honda.
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post #9 of 14 Old 08-20-2019, 03:02 PM
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Re: 4514 and 4518 combination relays

Quote:
Originally Posted by TomInGeorgia View Post
On my 4518, I had to whack my CDI module on the frame for a couple years to get it started. I bought a new module from Tom on ebay and it's been a joy to have quick starts again. It is a HIGH QUALITY product (I got the reproduction part, not a rebuilt one.) So far, my combination relay is working OK. I for one, really appreciate someone taking the time & investment to pick up the reins for Honda.
Ebay! OK... Thanks TomInGeorgia. I just re-read the original post in this thread and discovered the link to Tom Bauer's business. I called the Honda dealer nearest to me earlier today and was told the CDI unit was no longer available. They (she) was very matter of fact about it and did not seem sad. I certainly was. Now my day is brightened up considerably!!
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post #10 of 14 Old 08-20-2019, 04:28 PM
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Re: 4514 and 4518 combination relays

You're welcome, Haley Graham! Don't forget some dielectric grease on the connections prior to installing your new CDI module (it's usually in a small packet on the counter of an autoparts store. the packet is enough for a lifetime)
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post #11 of 14 Old 08-21-2019, 12:31 PM
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Re: 4514 and 4518 combination relays

Hi again to...whoever is interested besides me. Tom Bauer, your website states "To diagnose the CDI, unplug the black wire with the red trace. If you don't have spark, the CDI has most likely failed." I began with no spark at the plug. I unplugged the black wire with the red trace. I engaged the starter and got sparks at the plug!!!....but only two. Each time I engage the starter, I get only two sparks at the plug. What does that mean? And more importantly, what do I unplug to get all my sparks back?
Haley Graham
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post #12 of 14 Old 08-21-2019, 01:15 PM
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Re: 4514 and 4518 combination relays

Tom....ya' gotta let me buy you a beer sometime. It just struck me odd that I had no spark until I unplugged that red traced black wire. So then I thought maybe I should plug it back in and see what happens. I got all my sparks back!! I put everything back together, whirled her over and she fired right up! Maybe those 30 year old connections needed to see daylight again??? I don't know....BUT I've got a tractor again and I didn't need to spend 20 grand for a replacement! I think I'll go treat her to a filter cleaning!
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post #13 of 14 Old Yesterday, 09:37 PM Thread Starter
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Re: 4514 and 4518 combination relays

just coincidence. that wire grounds the CDI to kill the spark so with it unplugged is as good as you can get. sorry, it is gonna fail again.
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post #14 of 14 Unread Today, 05:52 AM
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Re: 4514 and 4518 combination relays

You're right Tom. The engine still loses it's fire intermittently. I almost wish it would fail completely and get it over with. After my lawn gets it's last mow of the season and before the snow flies, I'll send you my CDI for you to work your magic on.
Haley
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