Potash123

Some of you may remember that I have fitted a sprint 375 engine to a newly restored Hayterette. I want to use manual throttle in lieu of the automatic rev sysytem. If I fit the throttle cable will I have to disconnect the small springs connected to the fan paddle. ?? Please excuse my terminology for some parts. Regards Potash.

Many thanks lads. I have booked a holiday but she is still pointing at the stains LOL. Regards.

Whilst doing the garden decking I managed to get some decking oil over my new Indian Sandstone Patio. She is not amused. I have tried the power washer, was to no avail. Any ideas please.

Thanks lads. Well I got the Hayterette up on my bench today. I undid the bolt holding the blade disc and it freed up well ( Lucky me ). Engine out of the ally body and stored. Took the engine out of the Sovereign, removed the drive pully and it slotted in a treat. Could not believe how well it went. As the new engine is so good I am going to bare metal respray the body and respray the motor. the wheels will go in the dishwasher when the wife is out ( they are plastic rims ). Just need to sort out the modern lever to shut the engine down on the handlebars via the cable. Any advice would help on that one. Sorry can't do photos. Hope to give this a new lease of life. Then I am going to restore a Hayter 21 just for fun. Regards Potash.

Hi Nigel. I am trying to establish the threads used by B & S in general. I have boxes of new BSA, Enfield, AJS and Metric bolts, but nothing seems to fit these mowers. I appreciate the replies.

Thanks Nigel. Does anyone know about the threads please.

My old Hayterette engine has give up the ghost. I have a Sovereign self drive with a 375 B & S engine. Will the engines inter-change. What thread are these B & S engines as in the ancillary parts, who supplies them ? Many thanks.

Hi and welcome. Last year I did a bare metal restoration on an Osprey which went to good use somewhere in Devon. I have a solid Hayter 21 and an old Hayterette, the latter would like a new engine, I will keep an eye out for one. They are sitting in my greenhouse waiting for harvest to finish. I thought retirement was supposed to give me time on my hands. Keep up the good work. I would buy all the old rough cutters if I had time. Regards.

Well found the problem which I thought I would share it with everyone. Pampas leafs had wrapped itself round the drive shaft above the blade. It was so tight it acted like a brake causing engine issues. Took ten minutes to unwrap the leaves. Now running fine.

Mine is not Briggs and Stratton, it is an OHV engine with a carb with float bowl .

Had this little mower a couple of years, it's been good. Today I primed it and it started straight away, it cut out after a few seconds. This happened several times. Main jet blocked I am thinking, starting on the primer then running out of fuel ! I just stripped the cab and cleaned it out, carb cleaner, fuse wire etc. Now it starts and runs, but the revs are going up and down caused by movement of the governor arm. It will not settle even by adjustment of the throttle stop, Is there a pilot jet I have missed. Help please.

Thanks lads, the Walbro link is very good.

I have been working on two and four stroke engines since the 1960's and have no real issues. I recently acquired my first petrol second hand strimmer. Can someone tell me how the fuel system works please on these little two strokes. I have seen loads for sale on ebay that have fuel issues, the carb and fuel lines ? Is there anything I can read up on. I have pulled the carb to bits and they seem very intricate. Currently mine starts, revs fine but runs out of fuel if I rev it up for too long. It will start straight away and tick over quite quick all day long. It used to only run with only the choke on before I cleaned it. Until I learn the basic principles of these I will struggle, by all means make fun but we all learn every day. Thank you in anticipation.

You have a similar problem to me. I have also changed the relevant parts and cleaned the carb. It did fire once before that with petrol down the carb, but not since. Please update this thread with your progress. Thanks. PS I am not even getting a wet plug.

Well I have soaked the carb in an ultra sonic bath, changed the diaphragm, spring etc. All assembled and I am back to square one. I have a spark, but absolutely no fuel getting to the combustion chamber. Bearing in mind this did start once by pouring fuel down the carb, this only happened once and I have tried several times. I am wondering if I have no suction on the inlet side ( worn out bore ) come you experts. Regards Colin

Hi Keith. I recently restored one of those which went to a good home. I have another two in the green house. I would be keen to know how you get the old disc off of the shaft. Baited breath. Regards Colin PS There are loads of those discs about on ebay on a regular basis.

Thanks Nigel. I am thinking of upgrading the Hayterette. I have the aluminium disc with four small blades. Is the drive connection to this disc hard to split. Did not want to start a new thread on this as there are so many members on this section. Thanks lads.

I have been told by a second hand lawn mower engineer that all the smaller B & S engines are interchangeable and have the same drive shaft fittings. Any views would be appreciated.

Hi lads. I have fitted the new diaphragm as per the above, no issues fitting it. I am still not getting any fuel through to the combustion chamber at all, the plug is dry as a bone. I know the engine runs as I poured petrol down the carb. This only worked once only, but it did run fine for a minute. Obviously a blockage somewhere ? Help please.

Obviously these always need a new diaphragm after a while. I split the carb from the tank. The diaphragm is crap ( part no 391681 ). There are two springs on this set up Model 92908. There are two plastic feeds that go into the depths of the tank. They have hexagon intakes which appear to be made for a spanner. I need to thoroughly clean the carb, so do these plastic pipes detach from the carb. I need to locate any jets, pilot, main etc. This Hayter runs if I pour clean fuel down the intake, then cuts out. Many thanks.

I have obtained a 3.75 HP Hayterette with the four small blades. The blades are like razors but do not swivel. Will these free up with wet and dry on the bolts and bl blades with some lubrication. They are not expensive on ebay, but why throw money away when I have a tool box. Secondly the height adjustment system has some red plastic blocks fitted, looks like an upgrade. However the adjuster is very stiff, lubrication advice would help with this adjustment system, I don't want to force anything. Many Thanks Colin Sorry I cannot upload pic's.

Still running well, however petrol pouring out cap hole ( about 2mm ) I found another cap with a gauze inside the hole restricting the flow. It still lets fuel out the cap. Am I simply just putting too much fuel in tank. This is my first petrol strimmer. Thanks.

I pulled the carb off, put in the ultra-sonic for ten mins. New diaphragm and gaskets, job done its running again. A new carb was £50 plus vat ? So I am happy. Regards Colin

I have one of those sonic tanks, how long shall I leave it on for, thank you.