Troy-Bilt TB304H starts fine but throttle doesn't increase power

[dsteinschneider]

This Troy-Bilt TB304H is 2 years old. I figured rather than troubleshoot I'll just buy a replacement carb but I can't find one that says it is the correct replacement for the TB304H. The unit wouldn't run at all so I decided to clean what I could on the carb without pulling the diaphragm off (worried I would damage it doing so). Now it stars right up but it doesn't spin up much past idle rpm when I pull the throttle. The fuel lines and filter are good. Can you do a complete carb disassembly and re-use the gaskets/diaphragm in a pinch or is that most likely not going to work?

 

[Scrubcadet10]

Carburetor - 751-16046-4 | MTD Parts

Buy the Carburetor online and get your OEM parts quick! Orders over $45 qualify for Free Shipping.

www.mtdparts.com

does this look like it?

 

[dsteinschneider]

It doesn't have the third line like the one pictured but the Troy-Bilt parts finder it says the 751-16046-4 is the replacement. Maybe the photo is wrong?

 

[StarTech]

Well what the actual model number? Two versions apparently and they use different carbs.

41AD304H766
or
41BD304H766

 

[StarTech]

And the 751-16046-4 appears to be a Walbro WYLB-6-1 carburetor which Gardner and few other vendors even list. IF you could the Walbro the TB/MTD one is a lot lower in cost.

Repair kit is K2-WYLB
Primer bulb is 188-12-1, ethanol resistance primer bulb is 188-566-1

 

[dsteinschneider]

I bought the TB304H directly from Troy-Bilt - the invoice says model 41BD304H766

 

[dsteinschneider]

@StarTech - you've solved the mystery of why the carb looks wrong - I wasn't noticing my TB304H is a variant - 41BD instead of the 41AD that seems to be what all the parts suppliers show parts for.

 

[dsteinschneider]

I'm going to remove it from the unit and post photos here

 

[hlw49]

Clean the exhaust port and muffler screen.

 

[StarTech]

@StarTech - you've solved the mystery of why the carb looks wrong - I wasn't noticing my TB304H is a variant - 41BD instead of the 41AD that seems to be what all the parts suppliers show parts for.

This we have to have the true model and not layman model numbers for equipment variants do exist in about every machine.

In this case you are looking for



Now I haven't found a picture of that carb anywhere on the web yet.

I'm going to remove it from the unit and post photos here

Take multiple side view images if you can as the actual carb model maybe present where we can find a repair kit for it. NOte we do have a size limit for images so make sure they are 1000 x 1000 pixels or less. I usually post 600 x 600 images. Or you can upload to image hosting site and post the links.