DIY Forum

 

Ultimate Handyman Ultimate Handyman Ultimate Handyman Ultimate HandymanUltimate Handyman on Pinterest

 

DIY Forum/Home improvement advice forum

 

 

A-Z CONTENTS | DISCLAIMER | DIY VIDEO | HOME | SAFETY FIRST | FORUM RULES

It is currently Mon Oct 23, 2017 12:49 pm
Visit Thermo worx


Time zone: Europe/London [ DST ]




 

 


Post new topic Reply to topic  [ 8 posts ] 
Author Message
 Post subject: Mountfield SP414 Hunting
PostPosted: Sat Oct 29, 2016 1:51 pm 
Offline
Newly registered Member

Joined: Sat Oct 29, 2016 1:43 pm
Posts: 2
Has thanked: 3 times
Been thanked: 0 times
Hey all,

I have a mountfield SP414 with and RS100 Engine, it's 2 years old, it starts up fine but after a few seconds its starts hunting and running lumpy.

I've made sure the fuel cap isn't too tight, Drained the fuel and put some fresh fuel in, tried adjusting the idle speed, took the carb to bits and it all seems clean inside, Replaced the Oil, Air filter, spark plug and all the gaskets on the carb and its still running bad.

Before I give up and take it in, can anyone else think of anything I can try?

Thanks


Share on FacebookShare on TwitterShare on DiggShare on DeliciousShare on Google+
Top
 Profile  
Reply with quote  
PostPosted: Sat Oct 29, 2016 2:25 pm 
Offline
Senior Member
User avatar

Joined: Mon Mar 15, 2010 11:49 pm
Posts: 9406
Location: Oban
Has thanked: 326 times
Been thanked: 1661 times
Vacuum leak?? Not familiar with that engine but if there are any vacuum control lines then they might be suspect.

_________________
sent from my laptop using my fingers - because we REALLY need to know where it's come from.....


Top
 Profile  
Reply with quote  
PostPosted: Sat Oct 29, 2016 6:45 pm 
Online
Senior Member

Joined: Fri Jan 20, 2006 5:51 pm
Posts: 7195
Location: Essex
Has thanked: 406 times
Been thanked: 1407 times
There is a long legged thin spring (about 3" long) that has a hook at both ends that goes to the carburettor to the throttle linkage. This is on the crank at the engine end of the throttle cable. This seems to keep the running balanced and over time it stretches a little. If you bend the hook a bit more at one end it tightens it a little and often cures it from hunting. :thumbright:

DWD



For this message the author dewaltdisney has received gratitude : sampin
Top
 Profile  
Reply with quote  
PostPosted: Sat Oct 29, 2016 6:56 pm 
Offline
Senior Member

Joined: Sun Jan 31, 2010 9:21 pm
Posts: 1898
Location: Kent, Land of Apples and PYO
Has thanked: 36 times
Been thanked: 380 times
changed the inlet/carb gasket ? has the fuel line gone crispy ?

Image



For this message the author flash22 has received gratitude : sampin
Top
 Profile  
Reply with quote  
PostPosted: Sat Oct 29, 2016 8:34 pm 
Offline
Newly registered Member

Joined: Sat Oct 29, 2016 1:43 pm
Posts: 2
Has thanked: 3 times
Been thanked: 0 times
ive changed all the gaskets on the carb yes.
Oh cool ill give that spring a try tomorrow.
Thanks for your help everyone ill get back to you with my findings :thumbright:


Top
 Profile  
Reply with quote  
PostPosted: Sat Oct 29, 2016 8:56 pm 
Online
Senior Member

Joined: Fri Jan 20, 2006 5:51 pm
Posts: 7195
Location: Essex
Has thanked: 406 times
Been thanked: 1407 times
The spring is part 35 on Flash's diagram :thumbright:

DWD



For this message the author dewaltdisney has received gratitude : sampin
Top
 Profile  
Reply with quote  
PostPosted: Fri Sep 15, 2017 9:42 pm 
Offline
Newly registered Member

Joined: Fri Sep 15, 2017 9:33 pm
Posts: 3
Has thanked: 0 times
Been thanked: 0 times
sampin wrote:
Hey all,

I have a mountfield SP414 with and RS100 Engine, it's 2 years old, it starts up fine but after a few seconds its starts hunting and running lumpy.

I've made sure the fuel cap isn't too tight, Drained the fuel and put some fresh fuel in, tried adjusting the idle speed, took the carb to bits and it all seems clean inside, Replaced the Oil, Air filter, spark plug and all the gaskets on the carb and its still running bad.

Before I give up and take it in, can anyone else think of anything I can try?

Thanks


Top
 Profile  
Reply with quote  
PostPosted: Fri Sep 15, 2017 9:42 pm 
Offline
Newly registered Member

Joined: Fri Sep 15, 2017 9:33 pm
Posts: 3
Has thanked: 0 times
Been thanked: 0 times
just fixed my rs100 mountfield from hunting revs remove carb
remove plastic idle screw remove black plastic plug which was located under screw and found small O ring had broken off .throw O ring fit plug without O ring .jobs a good one


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

Time zone: Europe/London [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Visit Hilti


 

 

 

News News Site map Site map SitemapIndex SitemapIndex RSS Feed RSS Feed Channel list Channel list
ultimatehandyman privacy policy

Contact

 

Powered by phpBB® Forum Software © phpBB Group

phpBB SEO