Carburetor Impule Line

[SurfBeat]

Carburetor Impulse Line

As many of you members know by now, this Shade Tree mechanic recently had to dismantle a 93 GTX (580cc) engine to replace the crankshaft (CS).

As those that have preceded me in a similar endeavor, the project requires a complete engine removal from the hull and a complete engine dismantle, sans the Rotary Valve.

Now that I: 1) replaced the CS; 2) assembled the engine; 3) dropped the engine into the hull; and 4) connected all the requisite electrical components that had been disconnected to remove the engine from the hull, when I crank the engine - no fuel is being delivered to the carbs.

As a matter of background information: 1) I put in a couple (2) gallons of mixed gas; 2) ensured that the gas lines were clear of any obstruction; 3) qua-tripled checked that the gas lines are on the correct carb nipple, confirming (2nd opinion) with Dr. Honda's input on that factor; 4) and followed the Snipers advice to place a plastic bag over the flame arrestor to get maximum vacuum.

Reading a post by Voodoo to a Thread posted by another member, Voodoo suggested that sometimes, during an engine rebuild, the mechanic fails to properly time/align the Rotary Valve, the end result preventing the impulse valve/line from properly doing its job, providing suction for the fuel pump from the engine.

(If I did not quote Voodoo verbatim and accurately, I apologize. I am endeavoring to combine Voodoo's post with others whose names I cannot recall to my specific situation)

Moving on, following Voodoo's opinion, I disconnected the Impulse hose line from the carb to check for suction.

In my case, albeit I did not feel suction, however, I did notice smoke blowing through the Impulse line.

Does that indicate that my RV was properly aligned and I should be looking for another reason fuel is not being sucked into the carbs? (I don't want to go through the hassle of removing the RV cover because one bolt is very difficult to get to.

If yes,regarding looking for another source of the problem, any suggestions will be greatly appreciated.

If no, please elaborate.

 

[Bills86e]

Check your fuel routeing is circulating in the on & res valve position. Remove the
supply line from carb and put line into an empty beer bottle. Disconnect the carbs
return line and air chuck a lite amount of pressure into the line and wait a few seconds. It SHOULD come out and into the beer bottle. Turn the selector in all
three positions that it operates. Open gas cap to stop fuel flow, release air chuck.
Now the delivery system is primed. Put a 2' piece of clear line on the supply nipple
of carb, and other end into the bottle of gas. With *plug wires on the two safety
lugs on magnito to prevent fire, put a catch under the PTO carb return nipple and crank engine. It SHOULD drink the fuel from beer bottle! If not, pulse line or carbs
are culprit. Bill

Check bowl cap & vaseline grease the separator/filter square O-ring.

 

[SurfBeat]

I am sooo close to getting my Doo started, but still sooooo far away, so I need a clear answer to my present problem.

I can't get an answer to my question on the paid Premium site, so, hopefully someone out there on the Thrifty side of the Forum who have been very helpful, please post a response.

When verifying whether the Rotary Valve is providing sufficient suction and exhaust to pull gasoline from the gas tank to the fuel pump, if there is exhaust (smoke) exiting the Impulse line that connects the carb to the crankcase, is that sufficient evidence to indicate that the Rotary Valve was aligned correctly?

I've been told that the way to verify whether or not the RV was correctly aligned is to disconnect the Impulse line and check for exhaust and suction.

In my case, I dont' feel any suction, however, I clearly see signs of smoke exiting the Impulse lien when I crank the engine.

 

[SurfBeat]

Saturday Morning Bump before I get under the tree with my wrenches to get my Doo running.