跳转到主内容

Repair guides and support for a wide range of small engines.

53 个问题 查看全部

Adjusting valves on 280000 and 310000 series briggs & stratton engines

I have two riding lawn mowers I decided to purchase to start re-learning small engine repair on. One has a 287707 14.5HP and the other has a 31H777 18HP Briggs and Stratton engine. Both are OHV Single Cylinder Series; 280000 and 310000 respectively.

First things first, I figure I’ll verify easy to reach parts that usually need inspection and adjusting.

Currently, I’m focused on the OHV Covers underside, i.e. inspecting all the parts and setting valve intake and exhaust rocker arm clearance.

This document shows the gap clearance requirements for the intake and exhaust valve’s with their rocker arm. http://www4.briggsandstratton.com/miscpd...

However, I haven’t found a repair manual for each engine series yet since the holidays and am therefore not sure what the torque specifications are for the adjustment stud, adjustment nut and adjustment lock screw.

Does anyone know what the repair or other manual for each engine series specifications are and maybe any recommended advice regarding torque specs?

已回答! View the answer 我也有这个问题

这是一个好问题吗?

按维修分数 0
添加一条评论

1个答案

已选择的解决方案

Hi @jafinch78 ,

Here’s a link to a service manual which covers the B&S 280000 and 310000 series engines.

Scroll to p.101 for the adjustment procedure and p.170 and p.172 for the torque specifications respectively.

Hopefully this is of some help.

这个答案有帮助吗?

按维修分数 2

评论:

Hi @jayeff ,

Man, I totally opened up that manual and read the top left corner thinking was only for the 276781 model engine and as like a 270000 series and didn't read into more.

This time... well... page three is about obvious. :-|)

Thanks for posting this!

45lb-in for the rocker arm adjustment nut and adjustment set screw.

60lb-in for the rocker cover.

Wondering what the adjustment stud is set to, if that is 45lb-in also? That was the only other value in question I had.

Thanks again!

Hi @jafinch78 ,

You're welcome.

Glad you read on this time and didn't dismiss it again ;-)

Hi @jayeff ,

Yeah... I have two other engines that are the "L-Head Opposing Twin Cylinder" to study and work with, a 422707 (I think at least as the cowl is missing and only shows 18HP 694cc) and a 402707. Found the manuals for and this time read into some more to verify.

I'll post the link here while at it:

https://www.manualslib.com/manual/863144...

:-|)

I'll add a comment also regarding on pg. 99 noting that the aluminum pushrod rocker is the lower and intake valve. The steel pushrod rocker is the upper and exhaust valve.

显示更多的4条评论

添加一条评论

添加你的答案

James Finch 将永远感激不已
浏览统计数据:

过去的24小时: 1

过去的7天: 6

过去的30天: 15

总计 69