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Clutch / Re: which clutch springs?
« Last post by Msafi65 on December 18, 2018, 04:07:03 PM »
With the proper governor spring you will be able to get 4000rpm. Surge is usually governor adjusted wrong. The proper main spring is paint marked brown. Briggs part number 691507. If you have a red spring in your governor it will probably have to be tight enough to surge to get over 3500 rpm. Thatís the spring I find on almost all the replacement engines I see.  Red spring in the driven will hold in low speed a bit longer for more low speed power.  If you want to bypas the governor send me an email and Iíll attach a drawing that you print and use as template. Try holding back on governor lever and see if you can set idle to less than 1000rpm. If you can the governor is set to tight. You have to get the idle down or the transmission takes a beating.
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Clutch / Re: which clutch springs?
« Last post by snaps10 on December 18, 2018, 01:43:47 PM »
Now Iím feeling dumb. Moved governor spring to the other home on the throttle plate. Idle sitting at 1300 now. Guess this came off a generator or something.
Surging though. I think Iím running rich, have a little carbon fouling on plugs.. Stupid California engines and fuel Iím assuming. Can I adjust the air fuel mixture on the Nikki carb?  I donít see anywhere. Is it just through jetting?
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Clutch / Re: which clutch springs?
« Last post by snaps10 on December 18, 2018, 12:59:36 PM »
I can get it down to around 14-1500 but thats as low as I can get it to idle, especially without surging.  Carb is so clean you could eat out of it.  Exhaust is new and no leaks.  Fresh high octane fuel.
Good compression.  The governor seems a bit wonky though.  I've tried adjusting it, and that screw doesn't move at all, in either direction.  That's where I'm assuming my issue is.
Drive clutch is engaging at around 1600, not 1700 that it said when I bought.  It's whatever the new model Comet replaced the 780 with.
engine maxes out at 3,400, I think I can go a little bit more on the max screw though.
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T-20 Transmission / Re: TRANSMISSION BAND END FOR O-RING PLUNGER/PIN ?
« Last post by Msafi65 on December 17, 2018, 09:44:11 PM »
Bands that are TIG welded on both ends(after about 1983)are no longer marked for anchor end or plunger end. Used bands tend to show a slight straight spot on plunger ends. Early bands that were only pressure welded on one end were marked. Most of the manuals still list this as they were originally printed in the 70ís.
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Clutch / Re: which clutch springs?
« Last post by ascaw on December 17, 2018, 09:00:05 PM »
The idle sounds like it is way too high.  If you can get the idle down to the point you do not grind them when changing gears that will be much better.  Also with the idle that high you would have to have the brakes on with it in gear (forward with sticks forward) to keep from moving.  It should idle in gear (forward with sticks forward) on flat level ground and not move.  Try adjusting the idle to 1400 rpm with a single carb and red spring.  That rpm number comes from the B&S manual that came with my 16hp Max II.

If it still grinds and/or moves at idle try lowering the idle rpm further.  You do not want the driven clutch to move at idle.  The drive clutch should stay all the way apart at idle.  Also make sure the clutches are aligned and the belt is straight and properly adjusted.
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Clutch / Re: which clutch springs?
« Last post by garretttpe on December 17, 2018, 08:04:11 PM »
The idle sounds like it is way too high.  If you can get the idle down to the point you do not grind them when changing gears that will be much better.  Also with the idle that high you would have to have the brakes on with it in gear (forward with sticks forward) to keep from moving.  It should idle in gear (forward with sticks forward) on flat level ground and not move.  Try adjusting the idle to 1400 rpm with a single carb and red spring.  That rpm number comes from the B&S manual that came with my 16hp Max II.
iagree, my 18hp idles around 800rpm with no issues and I have the red spring
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Clutch / Re: which clutch springs?
« Last post by ascaw on December 17, 2018, 04:35:21 PM »
The idle sounds like it is way too high.  If you can get the idle down to the point you do not grind them when changing gears that will be much better.  Also with the idle that high you would have to have the brakes on with it in gear (forward with sticks forward) to keep from moving.  It should idle in gear (forward with sticks forward) on flat level ground and not move.  Try adjusting the idle to 1400 rpm with a single carb and red spring.  That rpm number comes from the B&S manual that came with my 16hp Max II.
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Clutch / Re: which clutch springs?
« Last post by Phelpsy69er on December 17, 2018, 04:32:35 PM »
Why is the idle so high???
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T-20 Transmission / Re: TRANSMISSION BAND END FOR O-RING PLUNGER/PIN ?
« Last post by ascaw on December 17, 2018, 04:07:07 PM »
The best way to figure out which way the bands were is to set the bands in place one way and then the other way.  If one way looks more natural or seems to line up better then that is probably the way you will want them.  Use the plungers without the o-rings or pins to test fit it.  I agree the bands are the same at both ends so either end can go in the plunger.  This may help you determine which way you want the bands to go.  Hope this helps.   twoCents
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T-20 Transmission / Re: TRANSMISSION BAND END FOR O-RING PLUNGER/PIN ?
« Last post by LittleG on December 17, 2018, 04:05:51 PM »
If the band's are welded at the loop like they are supposed to be the end that gets the plunger will be ground down a little bit where as the other end does not get ground down. But most importantly just make sure you have rights and lefts the fact they are realigned does not make one bit of difference
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