Yes, most all of the Briggs single cylinder engines are exchangable. You just need to be concerned to make sure that you don't under power your mower. In your case that is not a problem.
The torque sequence for a single cylinder Briggs and Stratton engine horizontal shaft head is increments of 2's for hp and 1's for head bolts. That makes 11 head bolts for an 18 hp.
From the 1994 Briggs & Stratton Repair Manual - For Single Cylinder 4-Cycle Engines, it says the three styles are Flo-Jet carburetors, Pulsa-Jet carburetors and Vacu-Jet carburetors. Hope that helps.
You do not state if it is a single or a twin (which it could be of either at that HP) so links to each below:
Most single cylinder failures on B&S twins are due to electrical failures. Check ignition diodes, coils, and key switch first.
More than likely, there will be a dot on the gear on the crankshaft, and on the timing gear, and you just need to make sure that they line up.
Any authorized Briggs & Stratton dealer can sell or order you one. Locate nearest at www.briggsandstratton.com or check your yellow pages under Lawn mowers. OHV Single cylinder: part # 276781 V-Twin Vanguard: part # 272144 V-Twin Intek, etc.: part # 273521 Twin cylinder L-head: part # 271172
Most single cylinder Briggs engines hold 40 oz of oil. SAE-30 type oil
Firing order for a 6.5 CI single cylinder engine is In this order .. Cyl # 1 first .. than Cyl # 1 and than Cyl #1 I will let you guess what comes next .... It only has one cylinder ... thetr is no order for firing ... multi cylinder engines have firing orders ... :) Thanks Dave. This has been puzzling me for years but your explaination makes it all clear.
If that is a cast iron engine its 5 horse, look up Smiths small engines in Google that's were I get all my old parts.AnswerI used to have this really old snapper rider that i had to reguild the engine on and I found parts through the local lawn mower shops and through online lawn mower parts sites. Hope this helps you. Call the Briggs and Stratton tech support line on www.briggsandstratton.com. You might even end up talking to me! I'm looking through a parts & repair manual for the model 14 as I type this...
Loosen the the screw5/16" socket) at the control panel at the left rear of the engine. Set throttle to full speed and move the cable housing upward; if it works the choke also, move it until the choke is just ready to be engaged. Then tighten the screw to clamp the housing.
turn engine to top dead center on compression stroke then turn 1 quarter of an inch passed set at .005