Mower engine needs fuel pump button pressing

[cryptogram]

Hi, I have a Subaru engine on my Ryobi mower and until it's reasonably warm it needs the priming button to be pressed every few seconds, or it appears to run out of fuel but picks up again when I press the priming button. Is someone able to tell me which part to renew to correct this?  Thanks.

[PeteB]

Blocked fuel line or filter or could be lazy pump that starts to get better with work or heat?

[cryptogram]

I've had the carb off and cleared any fuel lines. I'm not sure if there is a pump at all. I think fuel is gravity fed on those little engines, isn't it?

[adw]

What model engine is it? we had to stop using the rib in Subaru engine as could not find a reliable spare part source, a good engine but let down by spares back up, engines plus were the importer but lost interest real fast.

[cryptogram]

It's an EA190V engine. Have you experienced my problem? I get round it by having a clip on the handle so that I can let go, having started it, and rushed round to the front where I can press the priming button several times. This keeps it going for a couple of seconds, then it spits and makes to stop, so I press the primer several times and it kicks back into life. I do this for about half a minute and the engine seems then to be warm enough to go without this performance! I could get a new carb, I suppose, but do I only need a part of it?

[openspaceman]

2 hours ago, adw said:

rib in Subaru

=Robin Subaru?

[openspaceman]

1 hour ago, cryptogram said:

It's an EA190V engine. Have you experienced my problem? I get round it by having a clip on the handle so that I can let go, having started it, and rushed round to the front where I can press the priming button several times. This keeps it going for a couple of seconds, then it spits and makes to stop, so I press the primer several times and it kicks back into life. I do this for about half a minute and the engine seems then to be warm enough to go without this performance! I could get a new carb, I suppose, but do I only need a part of it?

I suspect this is a bit like the B&S engine that has no choke, the primer not only fills the carb but squirts excess fuel into the choke tube. I have a mountfield which is just the same, I leave it ticking over for a while before using it seriously.

 

Old british bikes with Amal carburettors had a "tickling" device for cold weather starts which lowered the float to let fuel spill into the intake, over use was a sure fired way to wet the plug.

[cryptogram]

No, I don't know what that means either! It so happens that my name is Robin but I doubt if that's relevant.

[Richard 1234]

Might need a carb kit. One of the diaphragms acts as the pump to drag fuel into the engine.

edit just read that it goes eventually properly!

have you had the air filter out and tried without that on. As in take out and close back up and see what happens?

Edited May 7, 2020 by Richard 1234

[cryptogram]

Openspaceman, I think you've sussed it but nevertheless, what bit has gone wrong that means I have to keep priming it to make it run? I have to say, it only takes about a minute before it starts to run properly but I'd like to sort it if I could. I don't need to leave it ticking over like you do your Mountfield