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  #1  
Old 08-28-2014, 04:28 PM
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timbo2 timbo2 is offline
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Default Double head gasket on 181

Looks like the PO used 2 head gaskets. The head bolts didn't seem very tight either but this is the first time I've removed one. Tons of leakage on the exhaust side.

I'll assume from this that 2 head gaskets is a bad idea.

gonna clean it up and try to sand down and level the head.





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  #2  
Old 08-28-2014, 05:52 PM
R Bedell R Bedell is offline
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Quote:
I'll assume from this, that 2 head gaskets is a bad idea
I would wholeheartedly agree.
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Old 08-28-2014, 05:56 PM
c69ss396 c69ss396 is offline
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In the words of my late father, "some people's kids"
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  #4  
Old 08-28-2014, 06:40 PM
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yeah the list of PO mods is pretty long on this one, some to be expected since its a replacement engine but some of this I don't quite understand.

It did start and run though.

Check out this throttle/Gov setup. no linkage, no spring.
It's on the list, pacing myself.

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Old 08-29-2014, 09:19 AM
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Quote:
Originally Posted by timbo2 View Post
yeah the list of PO mods is pretty long on this one, some to be expected since its a replacement engine but some of this I don't quite understand.

It did start and run though.

Check out this throttle/Gov setup. no linkage, no spring.
It's on the list, pacing myself.

I wish I had thought of that setup when I was a kid. Much more reliable than string. Young and dumb
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Old 08-29-2014, 06:32 PM
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WOW is all I can say!
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  #7  
Old 09-01-2014, 12:44 PM
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Here are some pics during and after sanding down the head as described in the tech section.




Is there any trick to getting the block side surface that smooth?

How do you keep crud out of the cylinder bore while cleaning block and piston?
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Old 09-09-2014, 01:53 PM
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Default Poor little feller!

I just want to hug this cub and fix him. Wierd!!
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Old 09-09-2014, 02:03 PM
J-Mech J-Mech is offline
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You need to keep sanding on the head. It's not flat yet.

I put the piston up toward the top and clean with a die grinder with a 3m roloc disc. (See pic) You can get them from parts stores..... sometimes. Then when done, clean off with brake cleaner and blow the bore out with compressed air. Spray brake cleaner in the bore if necessary, then blow it out again.

3M-7524.jpg
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Old 09-09-2014, 04:56 PM
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Thanks Jonathan.

I'll sand the head some more. Is 150 grit too coarse? I've been using 220.

Here are some pics. first time working on Valves.

Lapping the valves:


Magnet was a big help getting the keepers back on:
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