Author Topic: 33CI AVS HELP!  (Read 14752 times)

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Offline Tom Price

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Re: 33CI AVS HELP!
« Reply #30 on: June 29, 2017, 10:05:35 am »
Your problem sounds identical to what we found when we replaced a blown B&S 31 with a newer model 33 short block. Drove us crazy until factory technician told us after 2012 the crank and flywheel slot was changed to 11 o'clock.  From your pictures your GP has the older style crank and flywheel where your short block has the newer crank.  Just guessing that could be your problem.

That sounds like the problem
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Offline nic_hayes

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Re: 33CI AVS HELP!
« Reply #31 on: June 29, 2017, 10:10:18 am »
Process of elimination.  Put the stock flywheel on and completely rule out the arc.

Good idea.
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Offline Tom Price

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Re: 33CI AVS HELP!
« Reply #32 on: June 30, 2017, 03:52:24 pm »
Just to eliminate it I did just check valve timing and it is correct.  So looks like the problem is in flywheel timing like we all suspected lol
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Offline BIG AL 202

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Re: 33CI AVS HELP!
« Reply #33 on: July 01, 2017, 03:06:37 pm »
GLAD YOU FOUND IT!
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Offline Tom Price

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Re: 33CI AVS HELP!
« Reply #34 on: July 08, 2017, 11:53:14 pm »
Well, it's ALIVE lol.  We unbolted the flywheel from the hub and advanced it one bolt hole to see if it would start which it did but was still firing 14* ATDC.  Unbolted the flywheel from the hub and advanced it ANOTHER bolt hole and it was firing 49* BTDC.  So whe did some marking and degreeing and popped the flywheel off and removed the key and retarded it 19*.  Retorqued the flywheel and fired it up and sitting at 30* BTDC and running like a champ
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Offline PJG56

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Re: 33CI AVS HELP!
« Reply #35 on: July 09, 2017, 08:26:34 am »
So about 100deg retarded from the beginning,i wonder if ARC knows about this new crank setup..
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Offline Tom Price

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Re: 33CI AVS HELP!
« Reply #36 on: July 09, 2017, 12:29:22 pm »
I'm not sure, be a lot easier if they did and made a hub for it lol
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Offline crazycraftsman

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Re: 33CI AVS HELP!
« Reply #37 on: July 12, 2017, 09:53:08 pm »
Are you running the 33 crank gear? Because the model 28/31 gear is required to run with arc billet crank. It will mess up big time running the 33 gear or not run. Keyed slot if way off.
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Offline Tom Price

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Re: 33CI AVS HELP!
« Reply #38 on: July 12, 2017, 11:13:13 pm »
It is a balanced stock 33 crank, not a ARC billet crank
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Offline cycloneracer

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Re: 33CI AVS HELP!
« Reply #39 on: July 12, 2017, 11:48:15 pm »
Who balanced it?
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Offline Tom Price

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Re: 33CI AVS HELP!
« Reply #40 on: July 13, 2017, 07:24:17 pm »
Who balanced it?

BAK Engineering in Zanesville, OH.  Sent him the crank with the rotating assembly and balanced it
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Offline cycloneracer

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Re: 33CI AVS HELP!
« Reply #41 on: July 14, 2017, 01:07:07 am »
BAK Engineering in Zanesville, OH.  Sent him the crank with the rotating assembly and balanced it

Good deal.  I didn't know anyone who balances the AVS cranks. 
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Offline Tom Price

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Re: 33CI AVS HELP!
« Reply #42 on: July 14, 2017, 11:50:47 am »
He's on Facebook, good pricing and fast turnaround
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