Got a 6.5HP Briggs OHV that I think has a leaky oil seal on the exhaust valve.All my experience so far with Briggs has been with the older flat-head (valves in block) design. This is my first OHV. Haven"t studied the manual yet for this -- can anyone describe the procedure for replacing the valve guide oil seals?Thanks,James




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I don"t know how many of these had exhaust valve seals. If I recall, sometimes they are listed as discretionary depending on build. Model and type #s may be helpful. OHV"s are simple to remove the valve springs and can be done by your fingers. If you are steady enough, you won"t have to hold the head of the valve. What causes you to believe you have a leaking valve seal?


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Hi Tomplum,

I was mistaken earlier, it"s the 6.75HP Intek Edge OHV. Model is either 110000 or 120000 (I"d go to the garage and get the exact #"s if it wasn"t so late and cold ;).

We run this mower pretty hard, but with very strict maintenance. It has about 270 hours on the engine now.When new, it would give the little puff of blue smoke on startup, then run clean, and it used very little oil.

Now it puffs light blue smoke at irregular intervals, and the oil level goes down slightly - needs an add about every 5 hours. Starting is 1 pull quick and reliable, and the power is strong and flawless.You asked what makes me suspect a leaking oil seal. Let me bounce my observations off you and see what you think.

We"re in texas, gets really hot here, air cooled motors struggle to stay cool. Pulled the blower housing off during a PM and found what looked like too much grass debris packed around the head cooling fins, made me suspect it may have run too warm (which would degrade an oil seal). I pulled of the muffler and peeked into the exhaust port, and saw the stem of the exhaust valve was grungy with burned oil crud. Intake vave stem on similar exam was clean.I"m the one who uses this mower most now, and I"m getting tired of catching that whiff of burning oil. Burning gas smell - comforting, means profit :) Burning oil smell -- troublesome, means expense :(

I"ve seen many of your posts here and would respect your opinion. Thanks and take care.


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If you were up for it, get a headgasket set w/ the seals in it and pull the head, decarbonize and install the seals whether or not yours had them. If you have difficulty finding the seal #s if they aren"t in your IPL then let me know. It really isn"t a big task- just seems like there are twice the amount of bolts that one would have to pull out to do it than should be! These small Intek"s are not noted to have a headgasket issues like the larger frames, but the fact that there were cooling issues may have affected the gasket. You could try the seals only if you wish.




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Tomplum, that sounds like the most effective approach, just go ahead and pull off the head, and do HG and seals at the same time. Or I could just resolve to only use this machine on breezy days, when the wind would blow the stink away from me .

I don"t know what it is with me and Briggs, but my last half dozen Briggs motors have all become smokers. Anyway, I looked over the procedure and like you said it would be easier to just get the upper end gasket set and get this done before the season gets under way.