Weber 32/36 issues

G

grendel_cave

New member
My Scout 80 is getting closer and closer to getting out of the garage it has lived in for the past 3 years. One of the upgrades I've done is to introduce a weber 32/36 to the fuel system. I don't have much experience with either a 196 or weber carbs, but the Scout has very little power. I'm not sure how much power the 196 should have, but with the weber there is very little low end or high end power. As the engine was recently rebuilt, I think the issue May be jetting or the lack of a fuel pressure regulator. The carb has its stock jets and to get it to idle correctly the idle adjustment screw has to be screwed all the way in. So my questions are:

1. How much power should a stock 196 have to begin with? This one sports an IH Parts America reground 196 cam, the head and block have both been slightly resurfaced, and the pistons are 30 over.

2. For the power issue, does it sound like a jetting issue, lack of a fuel pressure regulator, or something else.

3. Any other ideas?

Thanks, aaron
 
While a 196 wont win any races it will be fairly peppy. My 152 does pretty well and will keep up with traffic

I would look at your base ignition timing. Disconnect the vac advance and set your idle ignition timing to 8-10*. You May have to slow the idle speed down after that and doing so will make the idle mixture screw have a bigger effect. If you have the throttle open a large amount to achieve the correct idle speed do to retarded timing, it will uncover the low speed progression holes and negate the passage.
 
Robert,

do you know what jets the weber carb needs to have to work well with a 1967 196? I found this information on another forum, but I have no idea if this is anywhere near accurate. I don't want to buy needless jets on the recommendation of someone unknown person:

jets for the 32/36 on the 196. 150 main, 180 secondary, 160 airjet main, 185 airjet secondary, idle jet 50. Now, that May be a little fat for a stock compression 196.

Thanks, aaron
 
If it were lean/Rich you would have some running issues like surging, bad hesitation, flat spots. Most of the time the jetting that comes with these type of carb are real close or a tad Rich for stock or basically stock engines regardless of the displacement.

I would to get some good plug readings and dial in the timing before moving on to the other things.
You will need 8-10* initial and or 34* total timing at rpm with the centrifugal advance maxed out and the vac advance disconnected.
 
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