G16 will not start

[shrike96]

Tried looking for this problem but was unable to locate and threads which would help. My problem is that the cart will not run. When it was parked last fall it ran fine but upon bringing it to get it ready for the season it no longer runs.
It has spark and it does get gas at the carb, even if starting fluid is sprayed into the air intake it will not fire off.

I did a compression test which yielded a reading of 65-75 psi. I am wondering if this to low for it to run or if perhaps there is a sort of auto decompression circuit which might not be working.

I am going to clean the carb next and check all the electrical connections and hoses to see if any thing might have come loose.

I really at a lose to figure this out and would certainly appreciate any suggestions to solve the problem.

Thanks

[Beachrights]

Did you treat the gas in the fall? gas now contains ethanol and raises havoc with carbs. It will leave a crystal like substance that will gum up the carb.

The 1st year it was introduced to gas every boat in our association had carb trouble!

Also could be airleak in the airbox.

[smallblock450sl]

To low of compression reading. Should be 155 to 175 lbs at wide open throttle. First check that one of the accelrator cables is not broken (#1 goes from the accelrator pedal to the govenor, #2 goes from the govenor to the carberator), that couse a low compression reading and no fuel to the cylinder. You caould also have a "stuck" valve. I've also seen valves get out of adjustment (4 thousanths when engine is cold). Let us know what you find.

[victorjohn]

Firstly, compression is too low. At 125 psi, it should fire.

[Mike Mac]

I'm banking with Smallblock on this one, with a broken throttle cable.

[victorjohn]

Spraying carb cleaner or starting gas should make the engine fire, at least until the liquid is consumed. Remove the spark plug, drop some oil inside the cylinder then take the compression. It should improve, otherwise you could have a broken compression ring. How about the two small wires plugged to the ignition coil? Trace their connections.

[technoid]

Originally Posted by shrike96

Tried looking for this problem but was unable to locate and threads which would help. My problem is that the cart will not run. When it was parked last fall it ran fine but upon bringing it to get it ready for the season it no longer runs.
It has spark and it does get gas at the carb, even if starting fluid is sprayed into the air intake it will not fire off.

I did a compression test which yielded a reading of 65-75 psi. I am wondering if this to low for it to run or if perhaps there is a sort of auto decompression circuit which might not be working.

I am going to clean the carb next and check all the electrical connections and hoses to see if any thing might have come loose.

I really at a lose to figure this out and would certainly appreciate any suggestions to solve the problem.

Thanks

Try the easy first. You said you have spark. But how do you know you still have spark under compression? Try a new plug. I have a plug tester/cleaner that allows you to see what a used spark plug does under a compressed air chamber. Plugs that appear to be good in open air can fail to fire acrossed the gap in compression. They short below the insulator.

[Beachrights]

Originally Posted by victorjohn

Spraying carb cleaner or starting gas should make the engine fire, at least until the liquid is consumed. Remove the spark plug, drop some oil inside the cylinder then take the compression. It should improve, otherwise you could have a broken compression ring. How about the two small wires plugged to the ignition coil? Trace their connections.

I thought the same on the spraying of stater fluid in the carb- should work if spark right? Replace spark plug, clean carb and fresh gas is my "newbie" solution.

[shrike96]

OK first of all I want to say thanks for all the excellent suggestions. I am going to redo the compression test with it wide open to see what it is.

Now on to the problem, for which I should have seen. It turns out it was a broken cable and once i turn the flap on the carb it fired off and runs like a champ!! Will finish the service and let everyone know how it worked out.

One small thing I find annoying about forums is when someone posts a question and gets answer but never gets back to anyone to tell of what exactly the problem was and what was done to solve it. (Just a pet peeve of mine.)

So many thanks again to all who helped out.

[technoid]

Originally Posted by shrike96

OK first of all I want to say thanks for all the excellent suggestions. I am going to redo the compression test with it wide open to see what it is.

Now on to the problem, for which I should have seen. It turns out it was a broken cable and once i turn the flap on the carb it fired off and runs like a champ!! Will finish the service and let everyone know how it worked out.

One small thing I find annoying about forums is when someone posts a question and gets answer but never gets back to anyone to tell of what exactly the problem was and what was done to solve it. (Just a pet peeve of mine.)

So many thanks again to all who helped out.

Glad you found the problem. Thanks for letting us all know what it was.