Lawn Care Forum banner
1 - 12 of 12 Posts

nater222

· Registered
Joined
·
7 Posts
Discussion starter · #1 ·
I have a 60" bad boy with the kawasaki fx850v 31hp motor. When it got hot it acted like it was starving for fuel. As many of you know it will do this when one of the coils is going bad. Psep.biz has the best price on coils by the way. I replaced the coils and it did not fix the problem. Last time that was what fixed it.

Anyway, it turned out that the fuel solenoid was failing. They are $105 and I read elsewhere that you can bypass the fuel solenoid. That was the fix. I may replace it down the road, but when you have 10 acres to cut,and your 3 days behind because of a breakdown, you may not have time to wait for parts.

The fix is this: remove the fuel solenoid on the bottom of the carburetor after removing the wire. Remove the he aluminum washer off of the solenoid. You can replace this with an o-ring if preffered. Get a 100 pitch m8 1/2" bolt and put washers on it until it is the same length of the threads on the solenoid. Add o ring or aluminum washer and screw it in to the hole where the solenoid was removed. This will bypass the solenoid and fix the issue.

The engine was dying at 1 hr of mowing and got progressively worse until I couldn't mow for 10 minutes. Today I mowed for 3 hrs straight with no hickups, and it did not backfire when I shut it off. I hope this helps some of you who were four letter wording like I was!
Nate
Eagle Crest Lawn and Landscape
Eagle, Idaho
 
Was just fixing to say to snip off the plunger of the solenoid. But..........beleive it or not... we have had customers do that......then Com in a few weeks later to buy a new engine because they hung a rod out the side because they parked a mower on a little slant and the fuel ran into the cylinders and slowly diluted the oil until it was just too thin to lubricate and seized up. It's the customers fault for not checking the oil daily as the manual suggests, but just wanted to forewarn you of the possible side effects of bypassing a design that cost kawasaki likely millions in research. There is a reason why that little "doomaflitchie" is on that engine. Besides just being a backfire valve
 
Discussion starter · #5 ·
Was just fixing to say to snip off the plunger of the solenoid. But..........beleive it or not... we have had customers do that......then Com in a few weeks later to buy a new engine because they hung a rod out the side because they parked a mower on a little slant and the fuel ran into the cylinders and slowly diluted the oil until it was just too thin to lubricate and seized up. It's the customers fault for not checking the oil daily as the manual suggests, but just wanted to forewarn you of the possible side effects of bypassing a design that cost kawasaki likely millions in research. There is a reason why that little "doomaflitchie" is on that engine. Besides just being a backfire valve
 
Discussion starter · #7 ·
Thanks for your input. Bypassing the fuel solenoid helped, and after further research I have discovered debris in the fuel line right at the fuel filter. I think Bypassing the solenoid helped all fuel get to the carburetor. The first thing I checked was fuel lines, debris was not apparent. After swapping coils, and pulling fuel solenoid the motor was still shutting down after 45 min. of mowing. I pulled the fuel line just below the fuel filter AGAIN and chunks of leaf matter came out. The main indicator of the clogged fuel line was air bubbles entering the fuel filter due to lack of fuel flow.
 
Discussion starter · #8 ·
Thanks for your input. Bypassing the fuel solenoid helped, and after further research I have discovered debris in the fuel line right at the fuel filter. I think Bypassing the solenoid helped all fuel get to the carburetor. The first thing I checked was fuel lines, debris was not apparent. After swapping coils, and pulling fuel solenoid the motor was still shutting down after 45 min. of mowing. I pulled the fuel line just below the fuel filter AGAIN and chunks of leaf matter came out. The main indicator of the clogged fuel line was air bubbles entering the fuel filter due to lack of fuel flow.
 
1 - 12 of 12 Posts