What motor?

G1355

Well-known Member
Just bought a white yard boss gt1650, all motor says is 16hp Briggs and Stratton 4cycle easy spin motor, what model motor is it. It has no spark and am assuming points and condensor, don't see a coil on it, but didnt look to hard. Any help would be appreciated thanks.
 
Thank you, couldn't find any model number on motor, do these motors have a coil, I should of looked at it closer sure it does, I found the points and condensor and will try and find a set now that I know the model, what usually ones wrong on these that they don't have spark. I seen one three on repolarizing the flywheel? What does that do, hope I don't have to.
 
First thing to do is isolate your problem to ign system on eng or safety sw's,ign sw or wiring on tractor.

Locate ign kill lead from points & disconnect lead where it connects to tractor wiring,crank eng & check for spark

If you now have spark with kill lead disconnected then problem in safety sw's,ign sw or tractor wiring harness.

IF still no spark with kill lead disconnected then problem in ign system on eng possibly caused by dirty or bad/pitted point contacts,point gap needs to be checked/set(.020")points set incorrectly,weak/bad condenser,bad/weak coil,weak flywheel magnets or lead from points to coil shorted to block.

The coil(armature) for ign is mounted on block above flywheel UNDER flywheel cover,cover must be removed to get to coil,don't loosen/remove coil unless it's a last resort to have coil checked or to replace if problem not in points,condenser or lead to coil as coil(armature)timing is adjustable on this eng,if coil loosened,removed or replaced timing on same will have to be reset.

Click on link below for instructions on setting coil(armature)timing if coil loosened,removed or replaced,move mouse pointer over text/pic & click left mouse button to enlarge.
timing
 
Rub the points with a point file or a piece of 320 wet or dry until shiny. Then see if you have fire to your sparkplug. You probably have an armature/coil behind the flywheel. Check the magnets on the flywheel for magnetism using a flatblade screwdriver. If there's strong magnetism and there's no fire to your plug. Your armature/coil is probably weak. Hal
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Check compression.

Then, add fuel.

It won't hurt to try a little gas in tank first. It might actually fire up if the bowl isn't full of gunk or leaking. More than likely the carb jet or needle seat is clogged.
 
See if eng fires/runs,if it does you'll have to reconnect kill lead or choke eng to stop.

Your problem is in either safety sw's,ign sw or wiring harness,if you don't have an owners manual for tractor do a google search for white gt1650+manual,click on link to mytractor forum.com,in replies are 2 links to download owners manual,hopefully there will be a wiring diag for tractor in manual so you can locate/check all sw's,start with seat safety sw 1st,this is the most common cause of a no spark problem,then check the rest of safety sw's & ign sw.
 
Ok, so I got it to run, I cleaned carb, doesn't overflow anymore, haven't messed with kill switch yet, although I have another question, why won't it start after I shut it off, only will start with a little carb cleaner or ether in carb, won't start on its own, and doesn't hardly take any and the its running and will stay running by itself, idles nice and runs wide open good, it backfires if you go wide open to idle fast but runs good, rather than starting again.
 
Starting problem could be caused by incorrectly set(lean)hi speed/low speed needles,dirt in internal hi/low speed passages of carb body,worn throttle shaft hole in carb body,choke not closeing all the way,air leak at carb mounting gasket,low eng compression caused by cyl/ring wear or leaking head gasket.

If you don't have a service/repair manual for eng check at local mower shop,ebay or briggs website for manual in either paper/cd version that covers your mod# eng,given age of eng you may need briggs obselete/out of production service/repair manual as after 80 the point type ign systems for the old letter/number series eng are not covered in newer manuals,manual will probably also help you with carb/starting problem.
 
Hi G1355, 120 psi is good, as Joe posted it could be a lean setting of the idle circuit, turn the idle jet out about 1/4 turn and see if it starts and runs better if you make it too rich it will smoke black when the throttle is advanced, those are good old engines lots of power and torque and they do like gas. If you want a manual for the engine look for: B&S Repairman's Handbook for Older Engines 1919-1981 CE8069, it should be available on the web somewhere, it covers many engines and at first is a little hard to figure out but all the information is there.
The owner operators manual is available from B&S on there site, you'll need all the numbers off the blower housing Model type and code numbers.
GB in MN
 
Ok, I don't ever work on Briggs motors, I have a hh100 and
k241 which I know very good, and know how to set carb, but
the Briggs is kinda different. I will mess with the setting on the
carb.
 
Did you try to start the engine? I would install a new sparkplug. If you have a twin cylinder replace both plugs. Hal
 
Your carburetor may be similar to the one on my Toro Grassking mower. You may need to open that main jet adjusting screw. If they're too lean the engine may overheat and lack power when working the tractor hard. Hal
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