Johnson carb tweeking

[Sol Searching]

Put a "New" 8 hp carb on and want to know what adjustments need to be done to provide max power. No top end power as of now. I have adjusted the "Low" speed jet on the right side of the carb. Where exactly is the "High" speed adjust?

 

[Vic.S]

Re: Johnson carb tweeking

Where exactly is the "High" speed adjust?

There isn't one!

 

[Sol Searching]

Re: Johnson carb tweeking

Damn! I knew that was going to be the answer. Thought I was overlooking it.

 

[Vic.S]

Re: Johnson carb tweeking

I think you need to look carefully at the parts lists for the 6 and 8 hp engines to see if there are any differences that you have overlooked.

I know I cannot realistically convert my older 6 into a 8 by swapping carbs. I forget all the reasons now but it was inlet manifold, leafplate related maybe even porting. I am not saying it was impossible just not worth it.

EDIT:

The cylinder and crankcase assemblies are different part numbers for the 6 & 8 so there is a fundamental difference there somewhere. For you to go through the whole parts list for that group and find the differences.