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Joined: Dec 2017
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What is the difference between a Quattro 40 and a 500 series motor. Ken.
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Joined: Jul 2018
Posts: 2,090 Likes: 81
SENIOR TECHNICIAN
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To start, pretty sure the 40 has an airvane governor, 500 series is mech governor.
Otherwise, I have been told they vary valve timing to get the extra power
but 40 is 4 hp remember
500 is 5ftlb torque
As the 3.5hp briggs became the 450, I would dare say not much diff between 40 and 500
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Joined: Jan 2013
Posts: 942 Likes: 18
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There isn't much if any difference between them. Not all the 500 series had mechanical governors, there was quite a few with the air vane governor. Conversely they also made some 450 series with mechanical governors, the one's found on a 16inch "909" or "Automatic"( I can't remember which one now) which was also fitted with an engine brake on them.
Last edited by bigted; 13/02/22 12:25 AM.
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Joined: Jul 2018
Posts: 2,090 Likes: 81
SENIOR TECHNICIAN
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Hi Ted
I remember the little 909 green mowers as well. From memory, the one I saw didn't have a throttle adjustment - just a spring about the same as a mech governor one but on a little peg. Start it and it ran at 3000rpm - on or off.
I immediately thought it had an airvane, but never looked further.
Only time I have ever seen a similar set up is american mowers or rovers for a few years
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Joined: Jan 2015
Posts: 1,488 Likes: 23
SENIOR TECHNICIAN
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This something that hard for me to say anything about as I have never gone marketing names but usually just by model and type numbers. Once I have them then I can look up the specs. Just too model style to keep p with especially when you run independent shop that repairs many different OEM engines.
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Joined: Jul 2018
Posts: 2,090 Likes: 81
SENIOR TECHNICIAN
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AVB, I have no luck getting people to tell me model type codes unless they bring it in, so have a reasonable off the top of the head converter.
Model type code makes it so much easier, but then briggs do stupid crap like half stamping numbers so I get told gibberish (especially later quantum)
series 500 is a 10t602 for sure, a common one over here I just looked up is a type 0146 H1
Quattro not sure but 10A902 rings bells, not sure of type, but my search history has 0164 which would have been a viking stihl mower I looked up
450 briggs is 09t502 , try 012 something. If I had a dollar for every oil change I have done on one of these 450s I would have a fair bit of coin. Very average motor, but good appliance and can take a hammering
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Joined: Jan 2013
Posts: 942 Likes: 18
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Yep, that's the one Tyler, single speed with the spring on a fixed peg.
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