Plugs dry on 1977 6hp

[ETHAN5438]

i was on the water and all of a sudden the engine stopped like it ran out of fuel checked tank plenty in there. I took the motor home pulled it a bunch and there was no fuel on the plugs completely dry.

 

[F_R]

They should not be wet. Wet indicates flooding. Check for spark.

 

[ETHAN5438]

They should not be wet. Wet indicates flooding. Check for spark.

I got spark for sure I shocked my self real bad when testing it

 

[F_R]

I absolutely Hate being shocked. Anyhoo, that is no substitute for a real 5/16" open gap spark test.

Got compression also?

 

[ETHAN5438]

I absolutely Hate being shocked. Anyhoo, that is no substitute for a real 5/16" open gap spark test.

Got compression also?

I haven’t checked compression kinda scared to see the number but would it really all of a sudden go out

 

[racerone]

Proper trouble shooting should be done.----Not sure why you hesitate on the advice given.

 

[Tim Frank]

Once you have checked compression and tested spark with a proper tester (hint: your right hand is NOT a proper tester ... as FR pointed out already ) you will know where the problem lies.

Otherwise, you are just throwing darts blindfolded..

 

[F_R]

I haven’t checked compression kinda scared to see the number but would it really all of a sudden go out

Sure. A blown head gasket will do it. So will a blown piston or broken ring.

 

[ETHAN5438]

Once you have checked compression and tested spark with a proper tester (hint: your right hand is NOT a proper tester ... as FR pointed out already ) you will know where the problem lies.

Otherwise, you are just throwing darts blindfolded..

I have checked spark with a a different spark plug and it was a good spark next I got to check compression

 

[racerone]

Spark on a plug is NOT A GOOD TEST.-----Still need to hear if spark will jump a gap of 3/8"", that is a true test of the condition of the magneto , coils . powerpack etc..

 

[Bosunsmate]

Ground all your plug ht wires so you dont damage the system and then turn the engine over using the starter (with fuel bulb previously primed hard). After about 3 seconds remove all the plugs, they should all be wet then

 

[ETHAN5438]

Spark on a plug is NOT A GOOD TEST.-----Still need to hear if spark will jump a gap of 3/8"", that is a true test of the condition of the magneto , coils . powerpack etc..

It ended up being a blown head gasket i got a new one and it sputtered, i then checked the carb and took out the highspeed adjustment needle on accident and noticed there was no needle on it so i soaked the carb in nitric acid for a couple of weeks till i could see into the venturi i then put the whole thing back together and now it runs good

 

[JohnnyGuy]

Curious, did you check compression before replacing the head gasket?

 

[racerone]

Was the high speed needle the factory option replacing the fixed high speed jet ?----The original fixed jet for high speed is in the carburetor bowl.------Or are you referring to the slow speed needle about 4" long found in the upper carburetor body ?

 

[ETHAN5438]

Was the high speed needle the factory option replacing the fixed high speed jet ?----The original fixed jet for high speed is in the carburetor bowl.------Or are you referring to the slow speed needle about 4" long found in the upper carburetor body ?

the slow speed whoops

 

[racerone]

Thought so too.

 

[Tim Frank]

Double check the cooling water-flow just in case the blown head gasket was a caused by an overheat.

 

[ETHAN5438]

Double check the cooling water-flow just in case the blown head gasket was a caused by an overheat.

once it heats up its pumps water

 

[oldboat1]

You should have spray out of the exhaust port on the back of the leg almost immediately after starting. Test the motor in a barrel, with water about half way up the leg -- but think you need a new impeller.

 

[racerone]

agreed----- it should pump water immediately.-----Water must be 6" above the pump in a test bucket.------There is no --" stop me / shutdown feature " on this motor.-----You risk damage by not installing an impeller now.----And check the thermostat too.-----I find many of them failed in the open position.