Re: how fast should my 73 chrysler 130 go
These engines tend to foul the plugs very easily. The first indication is a failure to idle well. So, the first thing to do would be to remove the plugs and either clean or replace them. I prefer cleaning since it is easy to do with the surface gap plugs and costs a lot less. You are using the correct plug, aren't you? Champion UL18V (preferred) or L20V (322); or NGK BUHX (preferred) or BUH. Do not use bent electrode plugs or multiple electrode plugs in an effort to get better idle or performance. All you will do is melt a hole in the top of the piston.
Second thing to do would be to be certain that the idle speed is correct. It should be about 700-750 rpm in forward gear in the water. That usually works out to be somewhere around 1000 at idle in neutral. Sounds high, but it is necessary. The engine will "clunk" when put into gear.
The sputtering could be fuel, but some of these engines have a rough spot at about 1500 when accelerating. Nothing you do will get rid of that. However, if the engine sounds rough and stumbles like it is loading up and then clears itself and accelerates, then it is too rich. If it sounds like it is smooth but dying, then accelerates, it is too lean. Lean conditions are dangerous for these engines.
If you mess with the low speed needles, start with the needles 1 1/4 turns out from lightly seated. Gradually lean them 1/8 turn at a time until the engine dies lean. Then richen them until the engine runs rough rich or even dies rich. The correct setting is midway between those two points. NO Matter What though, do NOT set the needles leaner than 3/4 turns out from lightly seated, and 7/8 is safer. Too lean and you will melt Piston(s) at high speed runs and it happens so fast, you will have no time to stop before the engine needs a rebuild.
