briggs 3.5 HP stretched/chopped/lowered murray cruiser
- Thread starter gbginger
- Start date
The crank sprocket is off a old western flyer beach cruiser. Drilled holes to fit the hub on my crank. I bought that from http://custommotoredbicycles.com. It's the 11" wide pedal sealed bearing crank.
maniac57
Old, Fat, and still faster than you
You might consider installing a NT bicycle engine carb. I have had very good results using them on briggs engines. You can use stock manifold if you drill out the mounting holes a bit to fit engine bolt spacing...
This is a Tecumseh but the briggs is the same.
This is a Tecumseh but the briggs is the same.
I think the carb you have should work fine as it is new. have you tried adjusting the jet screw on the bottom? and check for air leaks. Maybe pull the side cover and check the valve clearance should be 8 on intake and 10 on the exhaust. Yours looks newer so it may be 7 and 9 clearance.................Curt
silverbear
The Boy Who Never Grew Up
If you order an NT carb, don't forget that you need a manifold.
SB
SB
maniac57
Old, Fat, and still faster than you
briggs carbs are meant for constant speed use and the NT is a good upgrade to improve throttle response.
Nothing WRONG with the briggs carbs, but the NT is easier to tune and keep clean.
The small bore is not an issue as the briggs carb has about the same size venturi.
Nothing WRONG with the briggs carbs, but the NT is easier to tune and keep clean.
The small bore is not an issue as the briggs carb has about the same size venturi.
silverbear
The Boy Who Never Grew Up
I'm considering changing the carb on my Tecumseh powered snow blower to a spare NT carb I have. The stock carb is bogging down enough to be almost unusable as it is. I'll run more gas additive carb cleaner through it to see if it will run better, as I'f rather not fool with taking things apart in sub zero weather, but if that doesn't work I think I'd like to try the NT just to see how it goes.
SB
maniac57
Old, Fat, and still faster than you
Chainreaction
New Member
It looks like your pedal crank is geared kinda high, maybe 500rpm when your motor is turning 3000rpm. Maybe I am reading your tooth count wrong on that one picture.
the crank runs to a free wheel sprocket so its not turning with the motor. only when i pedal and its i think a 2:1 ratio i went with.
as for the manifold I am just going to make my own. and this carb will be all around easier. now i don't have to make a throttle linkage set up work with it.
maniac57
Old, Fat, and still faster than you
It's a work in progress...still needs brakes and motor moved closer to new 60t sprocket. Can't find my puller to remove clutch from the Briggs yet either. Too cold to look.
The Tecumseh I'm using now is literally a brand new engine. I pulled the head when I got it and it's factory new. I'd say under 10 minutes run time.
Totally lucked out!
Got it free for respoking a trike wheel. Guy was going to have me put a motor on it, but came back the day he dropped it off and traded it for a gokart. Gave me one of the two motors he had with it for the wheel. Random chance got me the new one.
maniac57
Old, Fat, and still faster than you
I have a bunch of mutts. NOBODY comes in my yard secretly.