Top "No Load" RPM on a 18HP Vanguard V-Twin

Sean2202

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I just replaced one of my engines with a New 18HP B&S Vanguard v twin Model Number 356447 3079 G1 (serial Number 1804021104540). This goes on a Toro Greensmaster and the engine is connected to a hydraulic pump. I want to make sure the engine is running at proper high and low RPM. Does anyone know what this engine top RPM is supposed to be set from the factory? I was told 3600RPM (factory no load) which seems high. An idle of 1750 (red spring) or 1100 (white spring) is the idle speed. Out of the box it runs at 3575 high RPM and 1650 idle RPM (With a surge at low RPM).

What is the engine model 350447 type 1331-E1 code 04051311 supposed to run for high RPM? I thought I saw 2950 RPM in the service manual which is what I set it at. Why would these two engines have such a difference in high RPM if both of these numbers are correct for high RPM?

Also I see a change in oil requirements. My old manual states SAE 30Wt oil over 40 degrees change at 50 hrs and filter at 100. My new manual states oil change and filter at 100 hrs can use 5w-30 synthetic or 15w-50 B&S synthetic. Which is the best and does the new manual supersede the old manual for engine model 350447?

Thanks for all your help
Sean
 

mechanic mark

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5w-30 synthetic is correct, read engine manual, change oil & filter after first 5 hours, break in period, then every 100 hrs. i use Valvoline or Pennzoil 5w-30 synthetic & change b&s filter every oil change. i also check oil level before each use & keep a close eye on air filter, inspect often.
 
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Sean your Vanguard is right on spot don't change anything.......

As far as the other I'll have to look that one up .......... What is the other engine on ???? It makes a difference ...........
 

cruzenmike

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My 18hp Vanguard is factory set at 3650. I reached out to Briggs directly with my engine code and they confirmed this for me.
 

Sean2202

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Thanks for the replies. I will recheck the RPM at the first oil change for break in period to see if it has changed. Is there a certain procedure for break in a new engine? I am currently running straight 30W until the first oil change then I will switch to 5w-30 full syn. Any ideas on why it would be surging at idle speed fresh out of the box?

I have at least ten 18 HP B&S Vangaurd v twins in my fleet from various years and various hours that run hydraulic pumps on machines. Most have been set at 2850 RPM. I will check each number at my B&S dealer to see the correct top end RPM. Here are a few of my B&S engines @Boudreaux

350447 type 1331-E1 code 04051311
356447 type 0200-E1 code 06062211
356447 type 0200-G1 code 08051411

Sean
 
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Thanks for the replies. I will recheck the RPM at the first oil change for break in period to see if it has changed. Is there a certain procedure for break in a new engine? I am currently running straight 30W until the first oil change then I will switch to 5w-30 full syn. Any ideas on why it would be surging at idle speed fresh out of the box?

I have at least ten 18 HP B&S Vangaurd v twins in my fleet from various years and various hours that run hydraulic pumps on machines. Most have been set at 2850 RPM. I will check each number at my B&S dealer to see the correct top end RPM. Here are a few of my B&S engines @Boudreaux

350447 type 1331-E1 code 04051311
356447 type 0200-E1 code 06062211
356447 type 0200-G1 code 08051411

Sean

Sean ........ The best way to explain the different RPM's on engines is this.......... When a manufacture company come out with a product, they will tell Briggs what they have and Briggs comes out with that engine for that company and that type of equipment they have....

Example..... You will see a lot of the same Model numbers with different TYPE codes, the middle set of numbers..... Those numbers are for the Trim color stickers ETC ETC......

RPM's are set at the factory with certain color coded springs and in a different hole on the governor arm for different applications, such as your hydraulic pumps..........

On push mowers RPM's are set to what size blade is on them ...... In the small Briggs engine manual there is a section for RPM's according to blade size......

Put it this way, if your Briggs are set to 2850 for your pumps and you pin them up to 3600 you could burn your pumps up..... Pumps are not a dime a dozen these days.......

Plus Tard Mon Ami ~!~!
 
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Sean ..... This is your question from post #1


" What is the engine model 350447 type 1331-E1 code 04051311 supposed to run for high RPM? I thought I saw 2950 RPM in the service manual which is what I set it at"

2850 RPM's is what's in my Briggs power portal info.......
 
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Sean........... Hold Da phone for a minute............... Are you saying that you replaced a engine that was running 2850 or 2950 RPM's on your Greenmaster with a engine that's running at 3600 RPM's ??????
 

Sean2202

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Yes. Original engine (350447) was running at 2850 RPM as are other engines in the fleet (not 2950 checked my notes again) I have researched the FSM for this machine and it lists the top "no load" RPM to be 2850 (+or minus 50 )RPM for the hydraulic system. Idle is 1650 (+ or minus 100) which is what it is running out if the box. I was under the assumption this was a direct fit. Should I change governor springs / settings to get the " no load " speed set at 2850 on the replacement engine?

Here is the link for the replacement engine for this machine which comes up as B&S
3564473079G1 which is what I purchased. (Not from here though)

https://www.rrproducts.com/B~S-Engine-18-Hp-product380
 
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Yes. Original engine (350447) was running at 2850 RPM as are other engines in the fleet (not 2950 checked my notes again) I have researched the FSM for this machine and it lists the top "no load" RPM to be 2850 (+or minus 50 )RPM for the hydraulic system. Idle is 1650 (+ or minus 100) which is what it is running out if the box. I was under the assumption this was a direct fit. Should I change governor springs / settings to get the " no load " speed set at 2850 on the replacement engine?

Here is the link for the replacement engine for this machine which comes up as B&S
3564473079G1 which is what I purchased. (Not from here though)

https://www.rrproducts.com/B~S-Engine-18-Hp-product380

No I cannot tell you to change your RPM settings..... You have to check with your dealer or Toro to see what the recommended RPM's are for your unit / pump........

The engine is a direct fit because it will bolt right up and the shaft is the same size...... RPM's should have been a factor in your equation when you talked to the Briggs tech on the phone ..... If you talked to a Briggs tech support rep....

Most all small engine warehouses will sell you a engine real fast to make the sale ........ They are not aware what you are putting the engine on in most cases...........

That's why when I order a repower engine for a customer I call my Brigg's Tech support to make sure that is the engine he needs...... In case something's not right I can return that engine to the warehouse........... No one wants to get stuck with a 1300 dollar engine....... And hold it for another 3 months or so and wait for another customer to come along ..........

Let us know what you find out ..............

Plus Tard Mon Ami ~!~!

Edit ............ BTW I did find out that the new engine you have is rated at 3600 RPM's ..... I read between the lines in a couple posts to figure out why you were asking those questions ~!~!
 
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