Question about Measuring Tools & Sensors
WIREING DIAGRAM FOR B&S ENGINE INTEK 18.5 HP, TWIN CYL.,MOD 407777, TYPE O174-E, C 030908YG
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Posted on Jan 02, 2017
an easy way to know that is to start engine and give it a shot of starting fluid ,if you can keep it running by this method I would replace diaphragm.
Posted on Jun 21, 2009
Bent push rods are a function of the valve guide coming loose in the head. The valve binds and you end up with a bent pushrod. Fix: Replace head. $94.00
Posted on Jul 20, 2009
these are common for doing this ,if you dont want to pull it down and hone the cyl. then i would use a heavier oil say 20w/50and that will probabley solve your problem
Posted on Oct 25, 2009
SOURCE: how do set valve lash
Turn the motor until the piston is at TDC. Look through the spark plug hole. piston to top of the cylinder. Then set them like you would any OHC rocker arm. BE very careful with the exhaust valve adjustment. There is like a mini disc on top of the valve stem spring keeper. If you get it too loose on a vertical engine it can drop out and it will take you forever to find the little bugger!
Below is only a recommendation....
I don't know how many hours that are on this engine your working on but... I would recommend you hand lap the valves with grinding compound if you know it has high engine hours. It will make it easier to start and have more power. The exhaust valves on these engines get very noteable black gunk buildup in the seat to the point you can not see the "valve to seat" mating ring on the valve head. The heads are not hard to remove... (One at a time) just time consuming. It can be a chore getting the valve push rods aligned with the engine horizontal. Most of the time and I know good Mechs don't like to hear this.. you can reuse the cyl head gasket on this model due to the design. Once in a while they break not very often.
The valve springs have keyhole locks on the keeper.
Thanks for using FixYa,
Posted on May 01, 2010
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