How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask J.R. Your Own Question
J.R., Small Engine Technician
Category: Small Engine
Satisfied Customers: 7445
Experience:  Owner of outdoor power equipment business, repairing all makes and models.
Type Your Small Engine Question Here...
J.R. is online now
A new question is answered every 9 seconds

should the valves be open at top and bottom dead center al

Customer Question

should the valves be open at top and bottom dead center alternately
Submitted: 6 years ago.
Category: Small Engine
Expert:  J.R. replied 6 years ago.

Hello and welcome to Just Answer,


The valves will be open near TDC. As for the timing marks, the Briggs are one of the easier ones. The camshaft gear has a dot or dimple on the gear. The crank gear has the same dot or dimple. Just line the 2 marks up and it is in time.

J.R. and other Small Engine Specialists are ready to help you
Customer: replied 6 years ago.
the cam gear does not have a dot but the gear has a slot indented on one part doesthis align with the dot on the crankshaft gear?
Expert:  J.R. replied 6 years ago.
That should be it.