20 Most Recent Honda 25cc 4-cycle Mini Tiller - Page 8 Questions & Answers

Check the float valve.

Check for continuity on the ignition module kill wire to engine block. Without the oil sentry there should be a single black wire from the ignition module to the ignition switch. This wire goes to the ignition switch and when in the OFF position connects to engine frame to disable spark.

You could disconnect the kill wire at the ignition module and then check for spark. If spark then the kill wire or switch is connected to block (short) or bad switch.

Drain fuel tank (reserve) and carburetor bowls. Take an empty fuel container and get two gallons of fresh fuel from the gas station. If problem goes away then check drained fuel for water.

notify honda

from your description sounds like a seized motor remove plug and try to turn over motor

make sure of correct belt also check and adjust tensioner or repair if faulty

their for safety but usually get mangled bent or left off after changing belt all you need is a bolt washer and nut to put back in place

google the model number and find a diagram

Per owners manual... WATER PUMP OIL IMPORTANT: If oil is white or foaming, water is in the oil reservoir. Change oil.NOTE: Water in oil occurs as a result of spray or condensation. Milky oil is not indicative of a pump malfunction.

And check operation of auto-choke.

it needs to be taken apart to see whats broken inside

Turnoff the engine & detach the spark-plug wire.unscrew the belt cover bolts which are located on the right side of the unit
Depress the clutch lever to release tension on the pulleys
Place the new drive belt on the pulleys
Replace the belt cover and tighten the screws to secure it in place

Here is what's going on. I cleaned the wheel "dogs" or whatever you call them multiple times. This DID NOT fix the problem. Look at the cable that engages the forward movement (self-propel function). If there is any slack in the cable near the handle, then there is retained tension at the transaxle. Not enough to move the mower forward, but enough to keep the wheel from freely rotating backwards. I tipped my HRX217 on it's side and located where this cable engages the drive box. Lubricate the heck out of it and coerce it to move with needle nose pliers. After thorough cleaning and lubricating both ends of the cable, I am now able to move the mower backwards without lock-up. Hope this helps someone, as I found nowhere on the internet that this is what REALLY fixes this

check the gear shifer sounds like it is out of adjustment

In order to start an engine needs: - A good cranking speed or equivalent. Compression. Timing. The right amount of fuel being delivered into the combustion chamber. A good spark at the right time. As your engine doesn't start, clearly there is at least one of those items that is absent or unsatisfactory. There are a couple of things you didn't mention - you didn't say the spark plug was getting wet with fuel and you didn't say you had checked the spark...

Honda engines usually start easily. If the engine starts and runs smoothly the problem is probably with the recoil starter - some designs can accumulate wear and detritus that can cause considerable friction and sometimes need taking apart for examination, cleaning and lubricating. Any worn parts should be replaced and pay particular attention to the ferrule the rope passes through and if worn should be replaced. The recoil spring can become gummy also adding to the force needed for starting. Removing it very carefully (because they can easily fly and bite) and wash it in a little petrol or similar and dry it thoroughly. Lubricating the spring is a sort of damned if you do and damned if you don't situation - lubricating the spring reduces friction and helps stop corrosion but does trap more dust and grit. Light machine oil is good but a little dry colloidal graphite is better. I find a silicone spray is satisfactory, though repeat spraying is needed regularly including the rope...

Could be carburetor float is stuck or the inlet needle not functioning. Check that engine oil level is not above normal.

Remove air filter cover and see if fuel has saturated the filter. Another sign of a stuck carb float.

clean fuel jet in carburetor or buy a new one for 30.00

Test fuel pressure and volume.

Not worked on too many of these, however it would suggest there is either wear in the screw shaft, or the crown wheel, you should also check the bushes the screw shaft runs in, if there is excessive wear the gears will not mesh properly.