I have a similar mower (except made by Monkey Wards) with the same engine and the same problems. I was assuming it was the carburetor, but after watching this video I suspect its also the coil. It runs perfectly, except when you turn it off for a few minutes and try to restart it refuses to fire off. If I let it cool down for a bit it starts right up. It also has the same issue with the spindle bushing on the front wheel, I had to replace the plastic bushings (I did all four). My mower was built in '95, I like it, but its my back up mower to a newer Craftsman. Well done video, thanks for making it.
I have learned jetting the carb out and increasing the RPMs a tiny bit help with cooling things. If it's the original ignition coil it probably is ready to be replaced. Just get either an OEM or Stens one, a little pricey but the cheap ones are not reliable for these.
I had an old zipper with a horizontal BS L head and it had a helper fan piggybacked on top of the flywheel I punched the jet out a little bit on it though I never did have any hot start issues with it but It was a bit of bear to start when it got down very cold I converted it to a Miata battery(What you ended up lasting 15 years till a cold snap came for it) and awg welding cable man she sure turns loose the juice to spin that little motor I shaved the heads on it and run her hard for another 12 years before it finally dropped a valve seat I made a makeshift gauge so I can monitor how much the governor was opening the butterfly on the carburetor And that thing stayed WOT (heavy thick tough grass balls to wall) most of the time when I took that motor apart and inspected it after the equivalent of about 250,000 mi The cranks and Con rods we're still perfect piston rings got a little wear cylinder still looked really good though
I had the same issue with both of those engines on my powr Kraft mower even with the second one that was put on it the second one was the 4 screw Niki carburetor
Could a sticking exhaust valve prevent compression? Can't get a mower to start. It's a 525XE engine. It sticks momentarily on compression release. Before you could spin it do I lapped it and cleaned of the carbon. It may be bent. When you throw it away you need it. I threw several of these heads away with valves in them.
Sometimes the exhaust valve will expand and be too tight and cause a low compression situation. You can likely spin the exhaust valve when it's supposed to be closed. Then you can pull the inspection window and see if the valve is too tight, if so, you could grind it down to get the clearance back.
@@mgomez5606 Sorry my mind was somewhere else. Yes that valve could cause compression loss. It is possible that it is bent especially if it isn't getting better the more you turn it. Try penetrating oil in the valve stem to see if that helps.
@@EllisMowersandmore I looked through my scrounge & luckily I found a valve. I’ll let you know how it turns out. TY for replying. What is your first name? Watch your videos.
And worse case scenario pull the engine and install a single cylinder intek engine 18.5 HP or higher no less than 18hp on a 46" deck. But yet I seen dynamark riding mowers have 14 HP twin cylinder engines on 45" decks . Those riders had weird deck sizes
I have a similar mower (except made by Monkey Wards) with the same engine and the same problems. I was assuming it was the carburetor, but after watching this video I suspect its also the coil. It runs perfectly, except when you turn it off for a few minutes and try to restart it refuses to fire off. If I let it cool down for a bit it starts right up. It also has the same issue with the spindle bushing on the front wheel, I had to replace the plastic bushings (I did all four). My mower was built in '95, I like it, but its my back up mower to a newer Craftsman. Well done video, thanks for making it.
I have learned jetting the carb out and increasing the RPMs a tiny bit help with cooling things. If it's the original ignition coil it probably is ready to be replaced. Just get either an OEM or Stens one, a little pricey but the cheap ones are not reliable for these.
I had an old zipper with a horizontal BS L head and it had a helper fan piggybacked on top of the flywheel I punched the jet out a little bit on it though I never did have any hot start issues with it but It was a bit of bear to start when it got down very cold I converted it to a Miata battery(What you ended up lasting 15 years till a cold snap came for it) and awg welding cable man she sure turns loose the juice to spin that little motor I shaved the heads on it and run her hard for another 12 years before it finally dropped a valve seat I made a makeshift gauge so I can monitor how much the governor was opening the butterfly on the carburetor And that thing stayed WOT (heavy thick tough grass balls to wall) most of the time when I took that motor apart and inspected it after the equivalent of about 250,000 mi The cranks and Con rods we're still perfect piston rings got a little wear cylinder still looked really good though
Nice work on this one casey she is a solid runner
I had the same issue with both of those engines on my powr Kraft mower even with the second one that was put on it the second one was the 4 screw Niki carburetor
What if grime is built up on block. A good power wash. Swap hot spark plugs with while it’s hot and try to start it.
It definitely was a failing ignition coil. Block was pretty clean and spark tester showed no spark when it wouldn't start.
@EllisMowersandmore I've changed coils that had spark and turned out to get the spark plug. Good to have spare good parts for troubleshooting.
Could a sticking exhaust valve prevent compression? Can't get a mower to start. It's a 525XE engine. It sticks momentarily on compression release. Before you could spin it do I lapped it and cleaned of the carbon. It may be bent. When you throw it away you need it. I threw several of these heads away with valves in them.
Sometimes the exhaust valve will expand and be too tight and cause a low compression situation. You can likely spin the exhaust valve when it's supposed to be closed. Then you can pull the inspection window and see if the valve is too tight, if so, you could grind it down to get the clearance back.
@@EllisMowersandmore the stem?
Its a OHV engine.
@@mgomez5606 Sorry my mind was somewhere else. Yes that valve could cause compression loss. It is possible that it is bent especially if it isn't getting better the more you turn it. Try penetrating oil in the valve stem to see if that helps.
@@EllisMowersandmore I looked through my scrounge & luckily I found a valve. I’ll let you know how it turns out. TY for replying. What is your first name? Watch your videos.
How come they don’t have pull rope on riding mowers?
The flywheels are likely too heavy and there would be too much kickback. They do put them on small riders.
I would hate to be paying you by the hour.
And worse case scenario pull the engine and install a single cylinder intek engine 18.5 HP or higher no less than 18hp on a 46" deck. But yet I seen dynamark riding mowers have 14 HP twin cylinder engines on 45" decks . Those riders had weird deck sizes
Luckily all of the things I did ended up fixing the issues it had. Dynamark mowers do have weird deck sizes!