Small engine ???

txhardcore · 10-13-2005, 07:27 PM

This isnt an mc but I figure yall can field it! I have a 20 hp Honda 4stroke that starts perfectly and runs at idle perfectly. Th problem is when I give it throttle it dies. To stop this I pull out the choke and it runs ,surges a little but runs pretty well. If I have the choke on at idle after start it dies. I am guessing it is starving for gas. The filter is fine and it is getting gas to the carb. What could cause this?

Cauldron · 10-13-2005, 07:32 PM

Sounds like something (krud) is blocking a secondary port in the carb. I don't know what kind of carb you have, but if it has any type of secondary port, that would be my guess.

Idle circuit
primary circuit
secondary circuit

Blast it with some b12 carb cleaner (off the engine)

txhardcore · 10-13-2005, 11:12 PM

Quote:

Originally Posted by cauldron

Sounds like something (krud) is blocking a secondary port in the carb. I don't know what kind of carb you have, but if it has any type of secondary port, that would be my guess.

Idle circuit
primary circuit
secondary circuit

Blast it with some b12 carb cleaner (off the engine)

I'll give it a try! Thanks!

G-Force Junkie · 10-14-2005, 12:00 AM

Yup, its running lean on the top end. Clean out the carb paying attentin to the jets ond orifices. Also, look for air leaks from cracks, dried up orings, etc on the carb to head manifold. It may be sucking air at higher RPM's.

txhardcore · 10-14-2005, 07:42 AM

Thanks! I'm gonna hafta tear it down I guess.

txhardcore · 10-14-2005, 05:40 PM

Broke down the carb today and cleaned it. Checked all gaskets to intake and carb. Runs great now! Thanks guys!

frewhl · 10-14-2005, 06:17 PM

Quote:

Originally Posted by txhardcore

This isnt an mc but I figure yall can field it! I have a 20 hp Honda 4stroke

is it a scooter?

txhardcore · 10-16-2005, 07:30 AM

Quote:

Originally Posted by frewhl

is it a scooter?

Nope. It's a motor to an adventure boat!

10-13-2005, 07:27 PM	#1
txhardcore ^OP KLR A-11 Joined: Sep 2002 Location: Texas Oddometer: 6,755	Small engine ??? This isnt an mc but I figure yall can field it! I have a 20 hp Honda 4stroke that starts perfectly and runs at idle perfectly. Th problem is when I give it throttle it dies. To stop this I pull out the choke and it runs ,surges a little but runs pretty well. If I have the choke on at idle after start it dies. I am guessing it is starving for gas. The filter is fine and it is getting gas to the carb. What could cause this?

10-13-2005, 07:32 PM	#2
Cauldron Now in DESMODROMIC! Joined: Apr 2004 Location: Chaingolia Oddometer: 2,841	Sounds like something (krud) is blocking a secondary port in the carb. I don't know what kind of carb you have, but if it has any type of secondary port, that would be my guess. Idle circuit primary circuit secondary circuit Blast it with some b12 carb cleaner (off the engine) __________________ and sorry about the D-con sprinkles on your strawberry shortcake.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: .
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

10-14-2005, 12:00 AM	#4
G-Force Junkie Beastly Adventurer Joined: Jul 2005 Location: Castaic, Ca (So.Cal.) Oddometer: 1,328	Yup, its running lean on the top end. Clean out the carb paying attentin to the jets ond orifices. Also, look for air leaks from cracks, dried up orings, etc on the carb to head manifold. It may be sucking air at higher RPM's.

10-14-2005, 07:42 AM	#5
txhardcore ^OP KLR A-11 Joined: Sep 2002 Location: Texas Oddometer: 6,755	Thanks! I'm gonna hafta tear it down I guess.

10-14-2005, 05:40 PM	#6
txhardcore ^OP KLR A-11 Joined: Sep 2002 Location: Texas Oddometer: 6,755	Broke down the carb today and cleaned it. Checked all gaskets to intake and carb. Runs great now! Thanks guys!