3416H No Power, Rough Running, Intermittent

[Haverhillman]

i recently picked up a 3416H at yard sale and have been starting to use it over the past couple of weeks. didn't realize what a good deal i'd gotten until i started looking around for information on it. came with tiller, trailer, blower, and mower deck...$225.00! It ran fine for a while but has recently started to act up. she seems to lose power when under load but it is intermitent. yesterday i mowed the entire lawn with no problem, today i couldn't get 2 feet without losing all power. i have rebuilt the carb already but wondering what might be my next step toward solving the problem without trying numerous other things with no luck? seems to me there are a lot of knowledgable people on this sight and would appreciate some advice. thanks!

[BLT]

For starts check for a plugged fuel line.

[Haverhillman]

thanks, when i rebuilt the carb i drained the tank, replaced the filter, and made sure i had flow.

[BLT]

quote:

---

Originally posted by Haverhillman
thanks, when i rebuilt the carb i drained the tank, replaced the filter, and made sure i had flow.

---

Next step if fuel line is clear is to open up high speed jet a tad. The cast irons are sometimes finnicky in that area. Try it then report back.

[Dutch]

Check for mouse nests behind the shrouds that can cause overheating and vaporlock. Service air cleaner. Check ignition system. Replace spark plug.

[docs]

Iv'e seen head gaskets do the same thing after it gets a little heated up. Looses compression. Make sure your heads are tight and properly torqued. Good Luck Doc

[BLT]

Also recheck your gaskets on the air intake elbow. Sometimes the gasket between the baffle plate and block slips down when you try to assemble it.

[Haverhillman]

thanks for all of those suggestions. i'm going to try them out when i get home tonight. gaskets were mentioned a couple times and i just remembered that my carb rebuild kit had 2 parts in it i could not locate on my carb. 1 was a blue , thick gasket and the other was a very small, green rubber ring. i decided that the kit was probably for 2 different carbs and that i didn't need them. did i miss something here?

[Haverhillman]

My friend came over, and we checked the ignition. It had a weak spark. When we pulled the cover off the points and condenser, we noticed it was sparking across the points -- bad condenser. We installed an Omega electronic ignition, because we had one on hand. Ran like a top after that. May go back to stock one day. Thanks.

[MN_FISH]

Great news and a quick fix! Now your investment just appreciated more! Have fun operateing your new equipment!