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Wisconsin Engines Single cylinder up to V4 engines.

Wisconsin Engines

Wisconsin AHH Ring Questions


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  #1  
Old 07-21-2019, 02:39:57 PM
anwalker anwalker is offline
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Default Wisconsin AHH Ring Questions

Hey guys just purchased an old heckendorn stump grinder with an AHH on it. Ran pretty good but leaking of every orifice. I want to replace the rings and I see the part number is DR-9. If I want to go up to .010 over is the new part number DR-9S10?
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  #2  
Old 07-21-2019, 05:32:06 PM
turmlos turmlos is offline
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Default Re: Wisconsin AHH ring questions

Welcome to the Stak!

Yes, DR-9S10 is the part number for a .010" over piston ring set for your AHH.

Wouldn't mind seeing a few pictures of that beast. Best of luck with it.
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  #3  
Old 07-21-2019, 07:06:18 PM
anwalker anwalker is offline
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Default Re: Wisconsin AHH ring questions

Thanks for the help! What's funny is the oversize rings are cheaper than the std. I've never seen a stump grinder like this before but it works awesome. I'll try to get some pics posted. I'm trying to figure out what the previous owner mcguyvered on the motor and what is oem.
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  #4  
Old 07-22-2019, 08:24:57 AM
radiodoc radiodoc is offline
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Default Re: Wisconsin AHH ring questions

If gaskets/seals are leaking you may want to consider the Q8 gasket set.
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  #5  
Old 07-22-2019, 01:12:18 PM
anwalker anwalker is offline
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Default Re: Wisconsin AHH ring questions

Ordered the gasket kit. I pulled the intake manifold off yesterday and the pitting around the exhaust port is horrible. I'll need go have my machinist take a pass on that surface and mating surface on the manifold.

---------- Post added at 01:12:18 PM ---------- Previous post was at 12:30:31 PM ----------

Where are you guys getting your rings from. I measured the bore last night and a std size ring will work just fine. Dr9 is the Wisconsin number and 7869 is the hastings number. A guy has a set on ebay for 50.00 and Pitt wants 52.00 which seams a bit steep for a ring set.
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  #6  
Old 07-22-2019, 02:06:16 PM
turmlos turmlos is offline
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Default Re: Wisconsin AHH ring questions

You might want to give Tim at Rock Creek Consulting a call.
814-766-3675
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  #7  
Old 07-25-2019, 06:13:29 PM
anwalker anwalker is offline
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Default Re: Wisconsin AHH ring questions

Guys, just want to give hats off to Jimmy over at mcives in Greensboro. I live near there and he went out of his way to find me parts.
On an interesting note, my bore measured 3.630 but the ring gap was .200". I don't know how this is even possible!
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  #8  
Old 07-25-2019, 06:47:14 PM
Pat Barrett Pat Barrett is offline
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Default Re: Wisconsin AHH ring questions

Wrong Rings,

---------- Post added at 05:47:14 PM ---------- Previous post was at 05:34:42 PM ----------

The AEH, AGH. series engines probably used same rings but in diff. bore sizes. AHH being the largest at 2.625
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  #9  
Old 07-26-2019, 09:18:16 PM
Zira Zira is offline
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Default Re: Wisconsin AHH ring questions

King-McIver used to be one the largest distributors of Wisconsin parts in this area. They do sometimes have really obscure parts on the shelves.
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  #10  
Old 07-26-2019, 10:14:38 PM
anwalker anwalker is offline
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Default Re: Wisconsin AHH ring questions

Yep. Like furnace chain for the throttle. Lol. He also tracked down a tune up kit for the old magneto.
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  #11  
Old 08-12-2019, 10:09:48 PM
anwalker anwalker is offline
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Default Re: Wisconsin AHH Ring Questions

Ok I installed the fresh piston and cylinder this weekend and the compression is awesome. I put a new set of points and condenser in this evening and noticed something odd. If I let the condenser hang loose in the air, the magneto throws an awesome spark between the points but as soon as I strap it down my spark is barely noticeable across the points. When I put the cover and plug back on the plug spark is orange and not the bright blue I'd expect to see.

---------- Post added at 10:09:48 PM ---------- Previous post was at 10:01:01 PM ----------

Ok I'm showing my age now. The condenser is doing what its supposed to do. Now I need to determine why my spark is weaker than I think it should be. Points are squared and gapped to .015. The plug wire pretty old and the brass contact in the cover may need polishing.
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  #12  
Old 08-12-2019, 10:31:59 PM
K-Tron K-Tron is offline
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Default Re: Wisconsin AHH Ring Questions

It sounds like the grounding arm on your magneto is not properly isolated from the magneto. When you ground the magneto (to shut the engine off) the arm you press contacts the body of the magneto and kills the ignition. A fiber washer might be missing from your magneto, or perhaps there is a chaffed wire causing a short to ground. You have the wire lead on the condenser hooked directly to the terminal at the 6 o'clock position at the bottom of the magneto right?

Chris
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  #13  
Old 08-12-2019, 10:34:25 PM
anwalker anwalker is offline
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Default Re: Wisconsin AHH Ring Questions

Yep 6 o'clock. I'm getting a spark buts it's orange. It was running before I tore it down and the spark was weak then too.
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Old 08-16-2019, 06:44:57 PM
pigpen60 pigpen60 is offline
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Default Re: Wisconsin AHH Ring Questions

Any chance we could get a picture of the machine in question? I have no idea what your working on but I am interested.
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Old 08-16-2019, 08:47:26 PM
anwalker anwalker is offline
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Default Re: Wisconsin AHH Ring Questions

This is it before I started working on it. Got it all back together this evening and cracked the fuel inlet on the carb casting. I'm going to try to plug it and jb weld it and use the other side port. If it isn't one thing it's another!
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  #16  
Old 08-17-2019, 08:50:03 AM
Zira Zira is offline
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Default Re: Wisconsin AHH Ring Questions

I never thought I would say this, but an AHH seems awfully small for a stump grinder. They usually had V4's or diesels on them around here.
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  #17  
Old 08-17-2019, 09:14:35 AM
anwalker anwalker is offline
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Default Re: Wisconsin AHH Ring Questions

Yeah I was surprised too when the guy sold it to me. She will down right destroy a stump. I took out the 10" stump in the pic in about 6min. I've never stalled it out on one yet and that was when the motor had horrible compression. The cutter head isn't that big so the load on the engine is ok assuming you make reasonable passes with each cut. I'm just bummed I broke the carb casting. Anybody have a body they will sell me?
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  #18  
Old 08-17-2019, 02:36:56 PM
Zira Zira is offline
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Default Re: Wisconsin AHH Ring Questions

Was it a Stromburg or Zenith? Did you break the top or the bottom?
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  #19  
Old 08-18-2019, 09:42:05 AM
anwalker anwalker is offline
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Default Re: Wisconsin AHH Ring Questions

It's a zenith 12544. I broke the middle fuel inlet but repaired it yesterday. I think the float is too high because the motor is running rich with the main and idle jets completely closed. I can't get it to lean out. My guess is fuel is coming through the vent and into the intake.
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  #20  
Old 08-27-2019, 11:51:02 AM
anwalker anwalker is offline
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Default Re: Wisconsin AHH Ring Questions

Just lost the AHH last night. Not sure what happened. Finally got the motor running great and the she started knocking from the topend under load. I need to pull the Jug again and see whats going on but something is rattling around up there. The motor still has compression ~80psi and will still start but as soon as I put any load on it, she knocks like crazy. Im starting to lose faith in this thing. I ground 4 stumps in no time then this happened.
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