Intek 18 hp OHV- #31E777 0443 E1. Loud popping at higher RPM, under load, or hitting bumps(roots, etc.) Video under 1st Reply. Thanks for any input.

[Klyonh]

The valve guides are the same length & set the same depth into the head
Check them before doing too much as one may have shifted

Do both intake and exhaust side have seals? Like you see in my pic before, only intake side has seal and kit only came with one.

 

[Mower King]

Do both intake and exhaust side have seals? Like you see in my pic before, only intake side has seal and kit only came with one.

Most only have 1 seal...that is the std in the industry but, their not needed on either valve really, they get hard in no time and don't seal anyway....won't smoke any more or less. Mower engines can use a little oil, it's the nature of the beast, it doesn't make them junk......but killing mosquito smoke...better look into that problem though!

 

[Klyonh]

After all my work, it still does it. Ugh! New carb, air filter, plug, amature with plug wire, head gasket, valves reseated, decarbed entire head, new gas tank, fuel lines, fuel filter, and oil changed.

Still it pops loudly when going up hill with blades engaged. Also, pops non stop when mowing along slight hill with mower leaning to the left. Black puffs of smoke from exhaust when it is popping.

NEED HELP!

 

[Klyonh]

Can only get about 2400 RPM. After that it starts popping loudly through exhaust.

 

[Klyonh]

Problem solved! Reed for crankcase breather couldn't open. Was off center and edge of cover was pinning it down. Unreal. Jeezaweez.

 

[Scrubcadet10]

Glad you got it figured out!!!! This may help someone in the future!

 

[Klyonh]

That is just crazy.

 

[slomo]

Pretty nasty black in here though.

Can you enlarge those pics to something over 320x240 rez?

wlomo

 

[Klyonh]

Can you enlarge those pics to something over 320x240 rez?

wlomo

Most it would allow me to upload. Sorry.

 

[Klyonh]

Fixed everything and still made no difference. Start doing same thing while mowing today. Will go 3400 RPM sitting in neutral with blades not spinning. Maximum 2500 or so moving with blades engaged. Any more and POW, POW, POW, POW with black puffs of smoke out exhaust. One odd thing was while adjusting carb unscrewed the idle screw all the way and wouldn't drop below 1900 RPM no matter where I set the mixture. Driving on hill with left side down and non-stop popping out exhaust with black puffs of smoke. No matter what I can not run wide open while cutting and moving. Just frustrating. I'm about to give up and just buy a new motor. This just sucks. Tons of work, time, and parts with no effective change. Also while adjusting the mixture could literally take screw clean out of the carb and it never effected how it was running. Screwing mixture inward would bog down at some point. But not when backing it out.