What kind of oil should i use on my weedeater mower, 158cc

generally, all B&S engines use SAE30 oil, however your local temperature range may make this an unwise choice. Google B&S Oil Chart

10-30 or 30 wt.

HD 30 WT.

Ori Hi, most lawnmowers use regular unleaded petrol now. If you have somewhere that oil goes into your mower then it will be normal unleaded but if on the fuel cap it has an oil can picture you need to mix it with two stroke oil.

remove oil check stick,Tilt it over and let it run out of the hole. New tech,lol.

I'm curious on how you checked the key way. They cost about a dollar and I would change it anyway. The popping sound is typical of an out of time ignition. Thanks, George

Your carburetor needs to be rebuilt. Does your Carburetor have a bowl on it, or is it the kind that mounts on top of the fuel tank?

Jim

Hi mtedepew...

Sounds like you have dirt/debris in your carburetor jets or fuel passages.
Check/Clean/Replace your fuel filter if you have one.
Also make sure you are using fresh fuel...and oil mix if your using a two cycle mower or weedeater with the oil to the right mixture and not too much oil as it can cause hard starting.
If the mower/weedeater is over a year old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
Sounds like you will need to clean the carburetor or replace your carburetor internal rubber parts like the diaphgram and O rings.
I recommend that you use a laquer thinner type cleaner to clean and dissolve the laquer build-up in the float and needle jet passages.
Be sure to remove all plastic and rubber parts before using the laquer thinner because it can dissolve the plastic parts and render them unuseable.
Be sure to use compressed air to blow out all the fuel and air passages.
Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.
Sometimes you can get by with priming the carburetor or using starting fluid and letting it run a few times like that and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Keep in mind that the float for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit.
When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their orginal position before you started.
Once you have your carburetor rebuilt that should solve your problem.
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A champion cj 8 plug will work fine. As far as air filter it is probably a paper on, take the old one to a dealer or small engine repair shop and they can match it up for ya.

you have water in your fuel tank, drain the tank by using a catch bucket and tip the mower sideways to empty out the fuel tank. replace with fresh fuel. Use any motor oil rated at 10W30 for the oil change.