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This is obviously just a guess but, it may not have been anything you did. I just did an autopsy on a SV840 that had locked up for no apparent reason. The gear that drives the oil pump and the Woodruff key were laying in the oil sump. All the internals look fine except the crankshaft is stuck in...

Yeah, I repaired it and used a zip tie to keep it up off the edge of the baffle. I looked at the rest of the harness for possible trouble spots then moved and zip tied anything that looked like it could rub. Thanks again.

You absolutely NAILED IT! The carb solenoid wire was rubbing on the metal baffle. I couldn't see it until I moved the wire as it was pristine on top but worn through an the bottom that was resting on the edge if the baffle. Thanks for the help! Hugh

I'm thinking stator. On the longblock swap it was pretty straightforward. Moved stator, flywheel, coils, fuel delivery, muffler, etc from one block to the other. Does the fact that it runs fine for 30 minutes or so give you a clue as to the fault? Thanks for the help!

Hello all, I'm working on an old (2009) Bad Boy Pro 27 with a Kohler 27 hp. I did a longblock swap using a used longblock and the original accessories including charging system etc. Mower preformed perfectly for several hours then began blowing the main fuse. I traced the issue back to the...

Without a receipt, it will just be store credit!🤣

I would suggest checking battery voltage with a meter with PTO off and as you pull it on. Also, repeat with the deck belt off. See if the battery is weak and drops or the PTO is going bad OR if the load from the deck is a problem (ie seized spindle/ idler).

Very first thing that I did.

Thanks, I have verified the key is not sheared. I have tried starting fluid BUT I didn't think to open the choke after setting it to start for the initial test. I have good spark on both plugs. I will start over today.

I understand and I don't get mad at anyone trying to help. I was trying to give you as much info as possible as to what I have done. I have been using in-line spark testers with plugs installed. I will re-check everything mentioned. Thanks again.

Ok, thanks. I have set magneto gaps to .010". Re: the carb shut-off, I've tried starting fluid directlyinto the intake manifold. No difference. That's what lead me away from fuel issue. It has good compression turning by hand, I had ruled out valve adjustment solely b/c it doesn't even try to...

Thanks for the info. Now, as weird as this sounds, I have good spark with the kill wire removed (only 1 each) BUT now I also have spark with it attached. On both coils. And still no start. Additional info: my buddy says he replaced head gaskets sometime last summer and it ran fine but he says...

Troubleshooting a no spark issue. Engine spins over. No spark. Both coils test good, checked for sheared crankshaft key, tried a known good voltage reg / rectifier, new plugs. One thing that I do NOT know on Bad Boy / Kohler is which (if any) safety switch will allow the engine to crank but cut...

Sounds plausible. It is a new carb but that certainly doesn't mean anything. I'll try that. Thanks!

I recently swapped out a longblock SV840 on a BadBoy 60" Pro 27 ZT. Runs perfectly except it stalls immediately upon engaging the deck. BUT only for the first few minutes. After about 5-10 minutes of running, it operates flawlessly. I checked voltage when engaging PTO, no significant voltage...

Thanks Rivets! I kept thinking that it acted like it was out of proper timing. I was not inside the block so I just kept going back over my work. It dawned on me when I was in the shower that if the flywheel had moved (like my Super Z did), the timing would be off. I very much appreciate your...

BINGO! We have a winner!

Believe it or not, I just thought of that too! I had that happen on a Hustler Super Z with a Kaw 850. I've been so caught up in double and triple checking my work that i completely forgot about that. THANKS! I'll check and report back.

Just completed a longblock swap. Have everything back together. Engine started with a shot of starting fluid. Ran perfectly, smooth idle, smooth at 50% (didn't try to run at wot yet). Shut it down and restarted several times perfectly. Let it set about an hour now will not start. Replaced carb...

As in using the same Denso starter as any other Kaw engine EXCEPT the JD had a smaller nose cone to fit into the housing that JD has Kaw design exclusively for them. Reg Denso starter $200. Same starter with the JD nose cone $349! BTW, the nose cone is easily swappable from the bad starter to...

It is likely not the battery. If you have not used it since purchasing the battery then you have a draw running in dead. More likely tho is that you used it for a short time and it was not charging. Get it running and check voltage at the battery. Should have about 13.0 to 14.0 depending on how...

And THIS IS EXACTLY why I very rarely even look at this forum any more. Less of a community of mower enthusiasts, more of a pissing contest.

You should be using 4cyl oil for air cooled engines.

Bert, My understanding of the system is that the VR rectifies the AC current into DC then regulates it to +/- 14V DC to charge the battery. Without the VR plugged in, why should the middle wire show anything? Doesn't it work as a pathway to provide DC from the VR back to the battery? Also...

Nice reply STAR! If you had read the op, I said I replaced the old VR with a new one. Now the new one test bad. Do "most of you" buy them by the case for one time use?

I figured. Next step?

Thanks Bert. The VR bolts onto the metal shroud just under the flywheel. I did make a seperate wire and attached to the engine block. I did a test with it unplugged, got 0.1 V DC at the center wire at WOT, 40+ volts AC on the outside 2 wires.

Trying to sort a charging issue on Ariens Max Zoom 60 / Kohler Courage Pro 25. Just acquired used. Dead battery. Former owner said the blades quit the the engine died. I assumed bad battery. Partially correct, battery would not take charge from charger. Replaced, started, ran great. Shut off...

I will reply knowing full well I will be attacked by the small engine God's on here. The owners manual on the mower I bought 2 years ago states that the new B&S engines DO NOT require periodic oil changes. They are designed to slowly consume oil through normal operation. You should just monitor...

How is being bothered by smart ass answers from "experts" who can't even read the original post being "butthurt"? My butt is just fine, yours?

Correct

FWIW, I have replaced head gaskets, carbs, crank seals, etc. on V twins and completely rebuilt weedeaters and chainsaws as well as small block Chevy engines (which do NOT require the crank and cam shafts to be removed to replace pistons and rings).

Reading the post BEFORE posting a smart-ass response is not asking too much. I am not a 'certified" small engine mechanic or I wouldn't be on here asking questions, however I clearly stated that I planned on removing the heads and case bottom. The question was quite simple. It just seems some...

Thank you for actually reading the post and posting an intelligent reply. Appreciated!

EXACTLY why I quit posting on this forum years ago! A simple question: can the pistons be removed, new rings installed and replaced without removing the crankshaft turns into "you shouldn't be doing your own work if you don't know that pistons have to come out" and "things have come apart"...

Did you even read my post?

I'm aware that the pistons need to come out. I was referring to the crank and cam shafts. Specifically, is there room to remove / replace and properly torque the rod cap bolts.

In a word, no. I'm not sure it's not just valve stem seals. I did have a bent exhaust pushrod about 400 hours ago. Would that give any indication of valve (or seal) issues?

Please forgive me if this is a stupid or redundant post. I have replaced a couple of FX850V engines because they eventually used so much oil. This FX691 is really just starting to get bad. (It has 1375 hrs) My question: is it possible to re-ring this engine by just removing the heads and bottom...

I had mentioned the park brake b/c I had spent hours trying to diagnose a similar problem only to fund out that the brake lever was stuck and all the safety switches had been bypassed. However, since the wheels turn when off the ground, obviously not the issue here.

What kind of park brake does it have?

Ok, assuming everything you just said is true, can't they at least smile and say ""Thank You", or would that be adding additional services?

Thank you very much for clearing that up.

Can anyone fully explain what makes a mower a 15A / 20A / 30A mower? I understand the stator / coils and voltage reg on the engine must be correct but is the wiring harness on the mower itself different? What happens if you mount an engine with a 20A setup onto the frame and plug it into the...

That's what I don't know. It's a FR651V on the airfilter cover but the spec tag on the engine shroud is FX730V-CS12 (which is what he posted online) which is obviously wrong. (It is not an FX style engine). My pics are too large to post here.

Sam, I have all Hustler mowers and unless it a a part for the frame or certain deck parts that are proprietary, I rarely get them from my dealer. Blades, spindles, bearings to rebuild spindles and front casters, plugs, filters, belts batteries, pto clutches, etc are readily available much...

I am going to replace the Kawasaki engine on an Exmark Pioneer E series 48" that I bought from a very dishonest POS online. It's a long story but regardless, he posted a pic of the spec tag which showed an FX 730V-CS12. The engine is actually FR651V (according to the air filter cover) and locked...

Since Husqvarna ownes or makes products for so many others, a lot of their parts fit multiple pieces of equipment so the likelihood of someone having them is stock is actually pretty good.

I didn't look mine up, I was going by the fact that all my FX 850s and FX1000s are 30 amp. Sorry if I provided bad info.