yes you can just jet it to your stock engine...no problem.
look at this, should help alot on how they work....
http://iwt.com.au/mikunicarb.htm
look at this, should help alot on how they work....
http://iwt.com.au/mikunicarb.htm
H50 with Mikuni carb setup
- Thread starter paulsblocks
- Start date
i've used 16mm to 22mm on Tecumseh HS40 and HS50 engines. with the only other mod being an open exhaust, the 16mm works just as well as the 22mm (maybe even better.) You need the larger carb size as you do other mods, like mostly, a bigger cam. If you do a dynocam 245 or 255 yea you'll need a bigger carb. In that case 22mm is probably most versatile. It will work with the 16mm, but to really get all you can out of the cam, the bigger carb is helpful. A smaller carb will basically limit the rpm (which perhaps is a good thing, depending on what you're trying to achieve.)
Nothing bolts up, you will have to fab an intake...the H engines have that factory intake adapter/spacer that makes a good template for the engine side.
Sounds like you're set on going slide carb but if you just want it to run without the throttle sticking, do a good carb cleaning, rebuild kit and put a proper minibike throttle assy on, it'll run fine stock.
Sounds like you're set on going slide carb but if you just want it to run without the throttle sticking, do a good carb cleaning, rebuild kit and put a proper minibike throttle assy on, it'll run fine stock.
I've looked at those throttle assemblies, but I already have a throttle cable that's ready for a slide carb, not to mention those plates are the same or double the price of the 16mm carb. Only thing I have to worry about is that adapter. My harbor freight welder kinda sucks, but I think I could patch any holes with jb weld. That or find someone who can weld on Facebook
I didn't see anyone address this specific question (though Delray knows what's going on), so...
The H is a larger format engine than the HS (aka small block), even though both were available in a 5hp model.
H engines were used in some earlier minis (and some later larger frame minis), but were soon supplanted by the easier to package and lighter HS series when they became avaiable. As such, HS stuff tends to be a bit more commonly encountered with respect to mini bikes.
Except the H25-H35, which are physically smaller than both, but we aren't talking about those.
The H is a larger format engine than the HS (aka small block), even though both were available in a 5hp model.
H engines were used in some earlier minis (and some later larger frame minis), but were soon supplanted by the easier to package and lighter HS series when they became avaiable. As such, HS stuff tends to be a bit more commonly encountered with respect to mini bikes.
Except the H25-H35, which are physically smaller than both, but we aren't talking about those.
just remember he is running big block engine. so stock or mod it will need at least 22mm carb...
Would it make any difference if you used the same carb on either?
if we are talking about complete stock engines as mentioned earlier a 22mm might be little to big for a hs-50 . it might sacrifice on low end response. now on a Big block H50 the porting is much bigger & valves and it would more then likely run much better then on a stock small block . also remember just because they make the same horse power doesn't mean they make the same torque.
I've always thought the H had more torque but according to Tecumseh published power curves they don't. More recommended operating range 1800-3600 versus HS 2200-3600 and slightly more torque available from 1800-2200 but otherwise the data says they're basically the same, 5hp at 3600 and peak torque just under 8lbs at 2700-2800.
Torque curve appears flatter on the H but it's more of a graphing difference. I'd be interested to see some actual independent dyno numbers.
Data from 1977 and 1983 Tecumseh Engine Specifications...thanks @cfh
http://www.pinrepair.com/minibikes/tecumsehmb.htm#good
Top of the page menu for download links
Torque curve appears flatter on the H but it's more of a graphing difference. I'd be interested to see some actual independent dyno numbers.
Data from 1977 and 1983 Tecumseh Engine Specifications...thanks @cfh
http://www.pinrepair.com/minibikes/tecumsehmb.htm#good
Top of the page menu for download links
This is what started my H50 build . Great little engines !
$350 shipped I dunno If I will get a motorsports crate or not though, it was not pictured.....I hope so, but might just be wrapped in the free paper towels that the jackass in the white house passed out during the hurricane a couple of years ago. No idea what they have as of yet. I am running low on coils, but I have feeling they cleaned those out on the last sell off if it is ugly chicken. Got a lighting system ready for it, gotta start watching for a nice clean early shroud to backdate etc...
I dunno If I will get a motorsports crate or not though, it was not pictured.....I hope so, but might just be wrapped in the free paper towels that the jackass in the white house passed out during the hurricane a couple of years ago. No idea what they have as of yet. I am running low on coils, but I have feeling they cleaned those out on the last sell off if it is ugly chicken. Got a lighting system ready for it, gotta start watching for a nice clean early shroud to backdate etc...
$350 shipped I dunno If I will get a motorsports crate or not though, it was not pictured.....I hope so, but might just be wrapped in the free paper towels that the jackass in the white house passed out during the hurricane a couple of years ago. No idea what they have as of yet. I am running low on coils, but I have feeling they cleaned those out on the last sell off if it is ugly chicken. Got a lighting system ready for it, gotta start watching for a nice clean early shroud to backdate etc...
I dunno If I will get a motorsports crate or not though, it was not pictured.....I hope so, but might just be wrapped in the free paper towels that the jackass in the white house passed out during the hurricane a couple of years ago. No idea what they have as of yet. I am running low on coils, but I have feeling they cleaned those out on the last sell off if it is ugly chicken. Got a lighting system ready for it, gotta start watching for a nice clean early shroud to backdate etc...
i been just just tripping over vintage tecumseh stuff lately. most are early 70-70's 4hp's and some 5hp. just found real nice one for a member here. that one was a early 70's off a snowblower. don't what to do a search for tecumseh stuff in wis or you will be on a road trip....lol
Carb is a VM22 from Tim Isky at Small Engine Cams .STORE (smallenginecams.com)