FX730V Bogs under load

hlw49 said:
Do a compression and cylinder leak down test. What do the plugs look like? Could be a blown head gasket.
Click to expand...
I do have a compression tester in fact. The service manual says 64psi. 1 read 122 and the other read 124. Dunno if my tester is not reading right, or they are both high but the same.
 
slomo said:
Waste of money here. Still have this issue so the seafoam which was originally made for 2 strokes didn't work, again.

Do the plugs say Torch on them? Where did you get the plugs from? Makes a huge difference. Same with the coils. Have you tested for spark with an open gap style spark tester? That also makes a difference over the light bulb spark testers.

OEM Kawasaki or Scamazon? Carb needle and seat plus the float height will need going over on ANY new carb. New doesn't mean new especially for mower parts.

More items that need testing. Do you have a solid fat fuel flow AT the carb inlet? Pull the hose off and pump it into a glass jar so you can see WATER and other trash in the bottom.

Are you still running the original fuel lines? They do deteriorate internally so you can't see any fuel restrictions. Recommend replacing all fuel hose from tank to carb.

Leading us to what could be the main culprit, your fuel can spout. Is your can spout an old open type or do you have a new sealed one with o-rings? Spout on the right should be tossed in the trash. One in the middle is a good one.

View attachment 73474
Click to expand...
Seafoam actually seemed to help it so i can throttle it up much faster now.

They do not say torch. They do in fact light when tested.

Scamazon. But as I stated, it ran perfect for over half a season after changing and 5 times this season.

No water in gas, and yes flow is very good.

Fuel Lines have not been changed, I will pick some up today and do that.

Funny the one you said is trash is like many I have. But either way, when i get gas, i don't store it, and it goes straight in.

Yes I have pulled the shroud as you have to to replace the coils. Fins are all clean.
 
slomo said:
From what the OP wrote, going with the usual, lack of fuel delivery slash improper air/fuel ratio.

Bet it's time to check valve clearance, cooling fins and maybe de-carbon the cylinders per your engine manual.
Click to expand...
To check the valves I will need new gaskets correct to reseal them.
 
ScrappyDoo said:
To check the valves I will need new gaskets correct to reseal them.
Click to expand...
Possibly. Or use what I use, a non-hardening sealant, gas and oil resistant gooo from Permatex. Perfect for oil pans and valve covers. Says aviation grade as well on the package.

Forget RTV, better sealants out now. Next guy to work on it will kiss you on the lips. Not having to clean up and prep all that RTV mess.

1780088050190.jpeg
 
I'd pull and clean the carb and make sure the filter is not dirty, I tried E85 fuel one time and had to keep it choked partially to keep my mower running , also the governor linkage may be sticking and not able to respond when you get into thick grass
 
Bertrrr said:
I'd pull and clean the carb and make sure the filter is not dirty, I tried E85 fuel one time and had to keep it choked partially to keep my mower running , also the governor linkage may be sticking and not able to respond when you get into thick grass
Click to expand...
Stick with non Ethanol Unleaded 87 octane. Your engine was made for it.
 
Took me forever to getting around to doing a video. If anyone can help please check it out. Notice how I can slowly throttle it to full, but as soon as I engage blades, engage driving, anything, its back to bog city.

 
You must log in or register to reply here.
Back
Top