Engine(s) problems

[Mudrig150 331]

So I'm still in a pickle with my motors... I've got some issues with both of em.

K241AQS- It has this wierd issue where it will not start, it pops, but it's like there's no torque to get the motor spinning up and running on its own. Doesn't do anything with the air cleaner on. Acts like it's running too rich, but the choke changes nothing. 

M18- Still have the spark issue. It get's intermittent spark at best, or most of the time, nothing at all. I've done everything short of swapping flywheels. I'll have to take the spark tester off and try again, but I doubt it'll change much,

[ZXT 2,401]

Do you have a video of what the 10hp is doing? From your vague description, it sounds like either it's not cranking fast enough, or the timing is off. 

 

Don't know about the Magnum. 

[The Tuul Crib 7,339]

2 hours ago, ZXT said:

Do you have a video of what the 10hp is doing? From your vague description, it sounds like either it's not cranking fast enough, or the timing is off. 

 

Don't know about the Magnum. 

sounds like a timing issue

[bellevillerod 835]

Timing ++ have you checked the valves to make sure they are working right. Broken spring or burnt, set wrong will do that on the 10 hp engine. The Magnum sounds like a coil but not knowing all that you have done hard to figure it out.

Edited February 28, 2020 by bellevillerod

[953 nut 60,027]

Ignition timing on Kohler engines.

 

Gapping the ignition points at .020 has always been the standard answer to how points should be set. That probably will get you into the ballpark where the engine will run, but with a bit of additional effort you can improve the engine’s power and performance.

The Kohler engine manual in the Red Square files section covers two methods for setting the ignition timing, Static Timing and using a Timing Light. This manual is a relatively new manual and it overlooks the fact that many of our engines were built prior to the ACR (automatic compression release) camshaft.

Earlier engines (mostly 1965 and earlier) had a Spark Advance camshaft that can not be timed using Static timing. At rest (and very low RPMs) the timing is retarded to fire slightly after TDC. The timing mark (SP) on your flywheel is at twenty degrees before top dead center but at rest the points on these engines break about ten degrees after top dead center. The only reliable way to check or set the timing on these engines is with a timing light.

There are a couple ways to determine what camshaft you have. Presuming the camshaft in your engine is the one it was born with the data plate on the engine has a suffix that can tell you what camshaft was used. The table below will tell you the suffix applicable to your engine. The other way to determine what camshaft you have is to remove the cam gear cover and take a look. If you see a mechanism attached to the cam gear it is the ACR cam.

 

 

The following engines have the spark advance camshaft;

K-141, Suffix prior to “C”

K-161, Suffix prior to “J”

K-181, Suffix prior to “D”

K-241, Suffix prior to “D”

[Mudrig150 331]

I have verified that the valves are moving on the K241. The M18 has everything set right, and still no spark. 

 

The K241 sounds like its firing, but not fast enough to run. The engine barely gains RPM for every pop. I'll have to reset the timing.