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model number.. 21B807 0130 B1. I believe the type number is 90223ZA. Above is the model and type number. I'll try the WD40 spray this evening and see if I can detect a leak. The thing with the carb is that it ran crappy with the original carb. He replaced it with a new one (aftermarket) and it...

Yes. its right at .003. The .004 drags in and out between the rocker and the valve. And the .005 wont go in at all. So withing spec. We got it back together and its still not wanting to run perfect. We had a hard time getting it started but after it finally started running and warmed up, it ran...

So I adjusted the vales. The exhaust was actually within spec but the intake was a bit loose. I was surprised at how much the rockers wiggle around when not depressing the valve. I originally thought it was the exhaust valve but after actually checking tolerances I was wrong. The Intake was...

Got the valve cover off and the exhaust valve rocker is VERY loose. Im going to measure and adjust but need to make aure im doing it right. I should adjust the valves when they are conpletely closed correct?

The gas is new. I know thats not the issue. I havent messed with the valves yet. I'll give that a go in the next couple days. Any other ideas before i get into adjusting valves?

sorry. I'm not sure why the images arent uploading. I was able to find the model number.. 21B807 0130 B1. I believe the type number is 90223ZA.

Wow! Thanks for the speedy reply! Sorry for not including that. The valve cover doesnt seem to have it listed. Theres a spot for it but its blank. Does that serial number help? (See attached)

Hello everyone! (Pictures attached) I'm trying to fix my neighbors mower for him. He just got a used Ariens zero turn with a Briggs motor. Its in great shape but we cant get the motor to run right. Below is the list of new parts we've put on... - new carb set to factory specs - fuel pump -...