Honda hrb 535 lawnmower hard to start

[islander]

Hi just joined this site so hello to everyone on here. Not too sure if I'm posting in the right forum but I'm having a bit of trouble with starting my lawnmower. It's a Honda hrb 535. Just got it out after the winter to give it a look over before spring and when you pull Start it its feeling quite hard to pull, not anything too drastic that you can't pull it but as if some things binding on. Also it took a fair old bit to get it to even fire and even then another 15 to 20 pulls before it started running. When I eventually got it going I let it run for a bit and when you engage the blade, again its quite tight before it engages fully as if something's binding on. Plenty of oil in it etc. Any help appreciated. Cheers

[Stephen Blair]

Welcome.

Did you winterise it?

Empty all fuels inc carb, clean it all underneath and grease all moving parts?

At college we were shown to remove the plug and pull the chord until the piston was in a certain position.

I've never done it since though:(

Sounds like you have just woken her up after a long sleep in a cold shed, give the plug a clean, stick some fresh fuel in and give her a grease if need be.

[Sussex Groundie]

All 3 Cables are stuck up, take them off the "handle bars" and run some WD40 down them.

[GardenKit]

From the description of the proplem I would say the Rotostop is at fault.

 

This is the device that connects the engine crank to the blade.

 

Whilst starting the engine the crank should turn without attempting to turn the blade. The blade should be 'braked' to stop it spinning.

 

Normally the engine starts freely, and then operating the blade enagement lever causes the clutch to engage the blade with the crank at the same time as the blade brake is released. Yours appears to be siezed so you are turning the blade against the brake whilst trying to start.

 

Dissmantle, clean and inspect it. Check that the central bearing is not siezed, or siezing.

[islander]

Hi thanks for all the replys, I will get onto cleaning the plug and carb etc and also strip and check the rotostop and see what's at fault. Ill post back once I've done this and let your know.cheers

[islander]

Bit of an update. Got around to stripping it down and I've found the clutch is pretty worn down and the bottom main bearing is jamming so this looks to be the problem. Need to get some parts ordered up for it. However I've ran into a new problem with the mower now. I though while I'm at it I'll strip the carb off and give it a clean out as well however when I've put it back on and connected the 2 rods and spring back up the choke is engaging fine but the throttle isnt . strange as I only disconnected it from the carb side and never took the rods fully off. can't see anything obvious that's the problem. Cheers

[GardenKit]

I think you may have the throttle link to the governor touching the crankcase breather pipe when you reassembled it. Check that the link is free to move.

It does not take much to make it stick.

 

Another thought is that the gasket between the carb and the insulator has dropped on reassembly and has only one of the bolts through the little holes. The gasket may be stopping the butterfly moving.

 

Good luck,

Barrie.

[islander]

Thanks for that Barrie, I'll have a look tommorow and hopefully it is just something simple like that. Cheers