Author Topic: 22 Ci 10 hp questions.  (Read 411 times)

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Offline HotRodBriggs

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22 Ci 10 hp questions.
« on: November 09, 2018, 12:33:36 AM »
I recently blew up my 25 ci 10 hp, and I have a 22 ci 10 hp laying around here.
Are there any billet parts (rod, flywheel..) that I could put into the 22ci?

If not then what's the highest I can rev it ungoverned?

Any help is appreciated.


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Offline rotten ron

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Re: 22 Ci 10 hp questions.
« Reply #1 on: November 09, 2018, 02:58:14 AM »
The engine is probably set to go maximum 3650 RPM ,any more than  that you need an aluminum flywheel  I had a stock flywheel on a small block Chev that got to about 8000 RPM before it exploded and ruined the engine and lots of other things If the flywheel explodes it could kill you or someone else

Offline HotRodBriggs

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Re: 22 Ci 10 hp questions.
« Reply #2 on: November 09, 2018, 01:55:32 PM »
Thank you, I'm wondering what parts are available. I know OEM parts are available. I don't know what to buy in terms of billet parts.

So in a way I'm wondering what to buy and where. All my searches have ended up with a whole lot of nothing lol.

My budget is $1200 for this engine.

I want to see what 22ci can really do.
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Offline PJG56

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Re: 22 Ci 10 hp questions.
« Reply #3 on: November 09, 2018, 07:35:22 PM »
Better off to find a 28 all kinds of parts for them..
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Offline HotRodBriggs

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Re: 22 Ci 10 hp questions.
« Reply #4 on: November 09, 2018, 09:26:55 PM »
I get the 28 is better, but I can't find one around here, and my local class has a 22ci maximum displacement.
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Offline Leon_Johansson_

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Re: 22 Ci 10 hp questions.
« Reply #5 on: November 10, 2018, 11:03:12 AM »
If you just run it ungoverned it could rev up to about 5000-5500 rpms until you upgrade the valve springs. It could probably handle just running ungoverned for a long time depending on how you drive and how much you rev it up.
If it is Synchro Balanced I wouldnít ungovern it at all because itís a really weak point in the engine if you dont get the billet dogbone.

The flywheel isnít as dangerous as some people make it seem, if you havenít bashed on it with a hammer or it doesnít have any cracks it will probably be good until you upgrade the valve springs, then it becomes dangerous.

My suggestion is to wait and see if you could find a 28 or at least a 25 to build or see of your blown engine is good enough, maybe some honing and polishing the crankshaft could be enough.

Offline HotRodBriggs

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Re: 22 Ci 10 hp questions.
« Reply #6 on: November 10, 2018, 12:11:02 PM »
Thank you, I'll run this 22ci stock for a while then, I'll keep my eyes open for a bigger engine.

Thank you Leon_Johansson_

I think I've seen you on youtube before, I'm probably subscribed.
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Offline cycloneracer

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Re: 22 Ci 10 hp questions.
« Reply #7 on: November 10, 2018, 01:40:19 PM »
If you just run it ungoverned it could rev up to about 5000-5500 rpms until you upgrade the valve springs. It could probably handle just running ungoverned for a long time depending on how you drive and how much you rev it up.
If it is Synchro Balanced I wouldnít ungovern it at all because itís a really weak point in the engine if you dont get the billet dogbone.

The flywheel isnít as dangerous as some people make it seem, if you havenít bashed on it with a hammer or it doesnít have any cracks it will probably be good until you upgrade the valve springs, then it becomes dangerous.

My suggestion is to wait and see if you could find a 28 or at least a 25 to build or see of your blown engine is good enough, maybe some honing and polishing the crankshaft could be enough.


You are 100% wrong about the flywheel.   Do not over speed a stock flywheel.  It is designed to run at stock speed.  When it explodes bad things will happen. 

There are pics out there of one that exploded.   The one pic has jeans stuck to the broken piece of flywheel.   And a chunk of leg.......

Donít do it.  Donít risk it.   

I think there is a flywheel out there for the 22.
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Offline Leon_Johansson_

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Re: 22 Ci 10 hp questions.
« Reply #8 on: November 10, 2018, 02:04:49 PM »
The whole engine is designed to be able to run well over 3600 rpm for a good well lasting engine. The only reason it only revs to 3600 rpms is because thatís what every small equipment engine is set to run. If it wasnít designed to be able to rev higher there would be a much higher risk of blowing them even at govorned speeds.
And when we get to the flywheel, the last thing Briggs & Stratton wants is a lawsuit because the flywheel was weak and hurt somebody, thatís why they design it to rev much higher.

Now dont get me wrong i would suggest using a billet flywheel if you got the money or atleast make a scatter shield. But youíre probably going to blow the stock rod before the flywheel.

Offline Leon_Johansson_

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Re: 22 Ci 10 hp questions.
« Reply #9 on: November 10, 2018, 02:11:24 PM »
Thanks hotrodbriggs, yea we talked on some video.
Iíve got another channel with my friend Called F&L garage on youtube where im going to to upload a video of my 28 very soon.

And if you ever find a billet rod that works for whatever engine youíre gonna build make sure itís the right length because the model 28 uses the model 28 avs piston with the billet rod or some of the model 21 pistons, the piston number is 792307 thanks to pjg56 for helping me find it.

Offline HotRodBriggs

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Re: 22 Ci 10 hp questions.
« Reply #10 on: November 11, 2018, 12:40:21 AM »

You are 100% wrong about the flywheel.   Do not over speed a stock flywheel.  It is designed to run at stock speed.  When it explodes bad things will happen. 

There are pics out there of one that exploded.   The one pic has jeans stuck to the broken piece of flywheel.   And a chunk of leg.......

Donít do it.  Donít risk it.   

I think there is a flywheel out there for the 22.


Thank you, under due consideration I would like to keep my legs, billet flywheel is on my shopping list for a weighty 350 dollars, do they make a rod for this?
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Offline Leon_Johansson_

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Re: 22 Ci 10 hp questions.
« Reply #11 on: November 11, 2018, 10:42:52 AM »
Whatís the complete model number on your engine?

Offline HotRodBriggs

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Re: 22 Ci 10 hp questions.
« Reply #12 on: November 11, 2018, 11:41:55 AM »
220707 is the model number, I don't know the type or code.
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Offline Leon_Johansson_

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Re: 22 Ci 10 hp questions.
« Reply #13 on: November 11, 2018, 01:56:02 PM »
From what i have heard the 21, 22, 25, 28 are basically the same engine with different strokes, head and sometimes different pistons.

If this is the case then they should all work with the 28 billet flywheel

I know the 28 and 25 shares the same rod and piston except the 28 avs that uses the same piston as the 21 wich is a shorter piston.
If the crank has the same rod journal as the 28/25 and if the stock rod is as long as your 25 rod or the same length as the arc 28 rod you could probably just use the 28 billet rod.

Offline HotRodBriggs

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Re: 22 Ci 10 hp questions.
« Reply #14 on: November 11, 2018, 02:47:55 PM »
I'm gonna find a 28, I'll run this until she blows
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