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    Kohler SV725 Charging Issues

    Well, I know it was more than a couple days, but I'm back. Turns out the polarity was wrong, though I'm not sure why I got it wrong this time when my procedure has worked in the past, so at least I have experience for the future. However, it still only produces 17.5 volts ac, so definitely...
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    Kohler SV725 Charging Issues

    They all still strongly attract the tip of a screwdriver, so they definitely still have at least some magnetism.
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    Kohler SV725 Charging Issues

    Have a courage 24 hp that is not charging. I jb welded the flywheel magnets back on and it still wasn't charging, only about 3 to 4 volts ac at the stator end leads. Some of the magnets were slightly chipped and one was missing a significant sliver, but I would still expect it to put out more...
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    Craftsman T1600 Riding Mower Blows blueish smoke

    Also before we get too far, check that the engine just isn't overfilled with oil.
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    Craftsman T1600 Riding Mower Blows blueish smoke

    After you've run the mower for a while, getting it nice and hot, stop it and remove the dipstick. Do you see a white-ish smoke slowly coming out? This is a telltale sign of a blown head gasket, or very excessive cylinder blow-by.
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    Best fuel stabilizer

    Fuel goes bad much faster in a carburetor fuel system because the volatile components of gasoline in the bowl will evaporate through the bowl vent, leaving behind the heavier stuff, and eventually causing the bowl level to drop enough for a little more fuel to be left in, and the process repeats...
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    XT1 LT50 blades won't engage

    Can you engage the blades in reverse, stop moving, then move the key to the normal mowing position, then try backing up again and see if the clutch will kick off? That will confirm to us that the reverse switch has a proper signal to the control module.
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    MTD 139cc Mower - RPMs Dropping Randomly

    Possibly something with the auto choke setup? Not exactly sure how the automatic choke works on this Chinese engine, but it may have to do with the governor arm position. Make sure the choke is staying wide open. A governor problem should never cause the engine to "die out". As always, a video...
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    Craftsman Koehler Command 16hp OHV no spark

    Ok my bad Charlie, i wasn't aware that this engine has DSAM on it. Basically there is an spark advance computer module box on the side of the blower housing, with two separate wires, i think one is yellow and one is brown, with spade connectors that go to the spark coil. My test procedure for...
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    Cub Cadet XT1 Safety switch Issues?

    When you say "pull", do you mean you unplugged the connector? Or that you physically removed the entire switch and connector? The connector may have a shorting bar to prevent users from disconnecting the seat switch, so that the mower will always die with the parking brake off. We need more...
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    Craftsman Koehler Command 16hp OHV no spark

    I thought the current standard procedure was to replace either DSAI or DSAM systems with the newer and simpler MDI system, which only requires a ground wire. https://discountonlineparts.com/lawnmower/?c=Ignition&b=Kohler&id=16691 The MDI system does not require a positive supply either. I think...
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    Craftsman Koehler Command 16hp OHV no spark

    The wiring diagram for your mower is on page 31 of this manual https://www.searspartsdirect.com/manual/19cq3tfazs-000247/craftsman-917271030-front-engine-lawn-tractor-parts See the box labeled "ignition unit"? This represents your engine magneto. The body of it is grounded (represented by the...
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    Echo Barrel Carb Small D Adjusting tool

    Good idea, the only problem is idk what size tubing would work.
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    Homelite Super 2 No Idle

    wow, yeah thats a big gap
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    I have a 6.5hp briggs on a poulan pro mower. The coil will spark a few times and quit, spark and quit.

    If I recall correctly, the darlington transistor is "turned on" by the magnetron-branded trigger coil, and when the transistor is on, it allows current to build in the primary winding.
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    Weird Issue - Engine Bogs & Stalls When Engaging Mower

    So you are saying it dies even with the belt off, whenever you engage the PTO? This sounds like a safety switch problem. A wiring diagram that should apply to your mower is attached. To check if it is a safety switch problem, I would find that junction connector that goes to the reverse switch...
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    Homelite Super 2 No Idle

    how far stuck open? The super two's reed valve had a resting position of about 30 thousandths open when I took it off. I read that any gap at all when in a resting position was bad, but it runs fine as it is.
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    I have a 6.5hp briggs on a poulan pro mower. The coil will spark a few times and quit, spark and quit.

    There are a huge variety of different methods for creating spark on small engines. Briggs uses the magetron setup with a trigger coil and a darlington transistor, tecumseh used a basic CDI method, and others like stihl have microprocessors in their magentos to limit top-end RPM. There was also...
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    Echo Barrel Carb Small D Adjusting tool

    D socket itself, here is the link I used: https://www.amazon.com/XLYZE-Single-Screwdriver-Walbro-Common/dp/B07B6MQVQB. Now that I look, it seems there are several "micro single D" adjusting tools but they all have poor reviews.
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    Echo Barrel Carb Small D Adjusting tool

    I am looking for the very small d tool used to adjust the idle mixture needle that is at the center of the barrel on many zama carbs used on echo equiment (and others). I managed to find one on amazon but it is still slightly too large.
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    Homelite Super 2 No Idle

    Turned out it was the gasket for the reed valve to the block leaking. I sprayed brake cleaner around there and it basically fixed itself and started idling right, so I took the gasket off cleaned the surfaces off as best I could and I used high temp rtv to make a gasket. Runs good now
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    Intec 12.5 Vertical

    Sorry bert, I had made the assumption this forum was just americans and canadians. My mistake!
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    Intec 12.5 Vertical

    What state are you in bert? I noticed that you never mentioned anything about snow blowers or snow removal equipment, which would simply things somewhat for you.
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    Intec 12.5 Vertical

    So you said you get about 2 machines done a day right? How do you even get to all of the different machines during the spring mower rush? Maybe I am misunderstanding how you work as a mechanic.
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    Intec 12.5 Vertical

    I never do it, but I do generally overtorque the bolts slightly from the briggs specification. I'm sure the OCD mechanics in here will say it is absolutely vital. So, you choose your pick. Are you afraid it will blow again? Take the long route.
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    Intec 12.5 Vertical

    What do you charge for all this, bert?
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    Intec 12.5 Vertical

    30 fuel filters a year? what? What do you even do as a basic service then? Just an oil change? On riders and zero turns with a paper fuel filter, it gets changed with every basic service.
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    Intec 12.5 Vertical

    Yes, I don't find these engines to smoke too bad when they do blow head gaskets, but they do usually smoke more than normal, especially once they are hot. The customer complaint is usually that the engine is smoking when they do blow a gasket.
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    Intec 12.5 Vertical

    Yup, there really needs to be a bolt in the bridge between the cylinder and pushrod cavity. For those engines that keep blowing head gaskets, do you check if the head is warped? You can use a machinists straight edge or a piece of plate glass and place the head on it and try to fit feeler gauges...
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    Intec 12.5 Vertical

    I test for head gasket leaks using a cylinder leakdown tester with the valve cover off, then try to feel a air current from the cylinder to the pushrod cavity. I bet if you had a smoke machine or something it would work even better.
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    Intec 12.5 Vertical

    What about a bad or a broken ring? Or scored cylinder walls? I've seen a few weird cases where the engine has compression to run but has terrible blow-by
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    Intec 12.5 Vertical

    does briggs recommend retorquing? I have never done that before, although I do typically overtorque their specs because I feel they are too small, I will usually do something like 25 ft lbs when they call for 220 in lbs
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    Intec 12.5 Vertical

    Nope. I have never used that before and I don't think briggs recommends any sealants. Before we do call it on the head gasket though, did you make sure it isn't just overfilled with oil or something simple? Typically blown head gaskets will cause engine smoking and there will be fumes coming out...
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    DC Voltage Output

    I find the best way to measure if the battery is charging is to use a DC current clamp and put it on the positive battery terminal with the engine at full throttle and all of the accessories (and electric PTO, if applicable), and see if current is flowing into the battery. Fool proof method and...
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    Rebuild kit ?

    Just to ask, why exactly are you doing a full rebuild?
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    Homelite Super 2 No Idle

    I have a homelite super 2 (the one with a 2 piece plastic clamshell), that will run great at open throttle, but when you try to let it idle, it gradually decreases in speed and dies after about 10-15 seconds. Idle mixture and idle speed adjustment make basically no difference, unless you have...
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    531 Hours- Popping out carb, running terrible, hard to crank.

    Damn. Could you see when turning the engine over by hand that the intake opened a noticeable amount more than the exhaust?
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    Murray G20300000 3hp Single Stage Snowblower - Spring-loaded butterfly carb lever

    That plastic piece is an air vane governor. It acts like a sail, creating a force in response to air flow created by the flywheels air vanes. This force acts against the throttle spring (to the left of the air vane) to try and close the carburetor butterfly. So when the engine is running too...
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    Briggs 625EXI rpm surging

    I have found these carbs to surge far less than any of the previous briggs aluminum vertical shaft engine carbs, just my personal experience. If they are hard to start that pretty much just comes down to the autochoke not functioning. I have noticed that sometimes it will stick open when the...
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    Briggs 625EXI rpm surging

    Personally I don't find them too bad. Aside for the throttle shaft breaking because its thin plastic, I love how you can remove the carb jet and emulsion tube easily to really clean it out. When I do a carb clean it is almost always like back to new on these carbs.
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    Will only run when warm

    probably around 20 thousandths
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    Briggs 625EXI rpm surging

    Typically I would suggest exactly the same thing, it is the cause of probably 75% of surging problems, but I believe these carbs do not have a low speed circuit. There is a plastic piece for an idle fuel pickup in the carb and a cast depression for a welch plug on the side like an emulsion well...
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    Briggs 625EXI rpm surging

    Yes but it would be super messy. Part of the benefit of using carb clean or brake clean is that it will evaporate and leave no mess. Both diesel or WD40 will leave a mess wherever you spray it that won't really go away
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    Briggs 625EXI rpm surging

    WD-40 is quite flammable as well though, especially with you spraying it in a mist form.
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    Briggs 625EXI rpm surging

    So, Bert, what would you say is the OSHA approved alternative method for finding vacuum leaks, hmm?
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    Briggs 625EXI rpm surging

    Found the safety nazi, lol. But have you actually done the spray test for vacuum leaks before? I have never had anything catch fire and it generally works very well. The only alternative is propane, which is still dangerous. Being a mechanic is a dangerous job man. Besides the occupational...
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    Briggs 625EXI rpm surging

    Since it runs well until it is fully warm on an auto choke model, that would mean that the carb is definitely running lean, and the period while the choke is still partially closed is compensating for this problem. Make sure the carb is clean, clean, clean. Then, I would check for vacuum leaks...
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    Will only run when warm

    This is a primer bulb model, right? Keep priming it to keep it from dying and yeah, it will smooth out after it gets hot and air density drops somewhat. Did you check that the plastic intake manifold is tightly bolted to the the block? That is a potential leak point, but doesn't seem likely with...
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    Cold start issues 1981 Briggs 11hp model 25

    Your last sentence says you bought a new carb. Did you do the starting fluid test like I said or no?
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    Cold start issues 1981 Briggs 11hp model 25

    I agree with this. I think since the air is being heated as it is compressed the actual pressure produced for a given compression ratio (assuming the air in the cylinder is at atmospheric pressure to begin with), could possibly be a little higher, but yeah there is no way you could hit 150 psi...
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