18hp Briggs Opposed Twin with VM26 30mm Mikuni
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- Опубліковано 20 сер 2024
- Briggs opposed twin running with a VM26 Mikuni style carb from Amazon. I had to elongate the holes on the intake that came with the carb for it to fit on the stock Briggs manifold. I’ve also changed the needle to the highest setting (clip at the lowest position), swapped to a 90 main jet and a 25 pilot jet (stock that came with the carb was 100 main and 20 pilot, needle clip in the middle position). I’m also using a vacuum type fuel pump which I will list the link to.
I’m planning on using this engine on a 12’ Jon boat with a custom made surface drive.
Here’s the carb kit from Amazon:
Cylinman VM26 PZ30 30mm... www.amazon.com...
Here’s the fuel pump:
Fuel Pump for Kohler 17HP-25 HP... www.amazon.com...
Those briggs and stratton opposed twin engines are my favourite engine that briggs and stratton made
The older model 28 single cylinders they made were also pretty good. But yeah, Opposed Twins are awesome
@@motormouth2472 Hope i can repair mine, it threw a rod. It is the 46 series too. I could always swap in an an OHV...
My favorite as well!
I love Briggs flatheads, i love the opposed twin even more.
That thing sounds so good!
Get an intake from a horizontal shaft engine. It will flow way better
Good idea, I didn’t think of that
I just tried looking for one and can’t seem to find one. All the ones I saw on eBay looked like vertical shaft intakes. That or I just don’t know what the horizontal ones look like
@@ozzyvanhalenrox basically the same but diagnol and no 90 degree bends
@@joshmanis9860tout simplement sans pipe dadmition en direct sur la pipé d’origine la noire
@@joshmanis9860le plus compliqué c’est pour le flotteur de la cuve il faut qu’il y ai un réglage particulier
Could easily handle a VM36!
Shouldve ran 2 carbs one on each cylinder
Hi! I need an advice since I got an opposite 18hp and I can't remember how I should assembly back the intake valve, the order of oil stem spring and retainer. Plus I need to know how bad can be that I made a govenor delete, since I can't assembly it back cause the thread for the pin(retainer) is shredded so needs I fresh thread to keep the governor assembly. Thank you in advance.
search online, there is a great service manual.
@@alb12345672 thanks for help.quite sweet
I haven’t had the valves apart, but I’m sure there are other videos that show it. My governor is removed but the internal assembly is still there. Hoping it won’t blow up
That carb is way too small for that motor
What is the intake off of
It looks like a stock ssr125 or Honda CRF 50 intake to me
It’s the intake that came with the carb I linked in the description
What mufflers are those on there? A model number perhaps? Plz?
Have you installed the horizontal intake yet?
Hows the throttle response?
It’s actually gotten a lot better since I fine tuned the jetting. I think I have the needle all the way in the highest position (clip on the bottom groove) and a 90 main jet. I forget what I have for a pilot jet, but it runs really well now.
How did you hook the vacuum fuel pump up?
same way you hook and vacuum pump on you hook a pulse line from the crankcase to it then up to you fuel lines
Hi I was curious what other mods you did to it and how it runs off of a single carb? Can I go bigger or is 26mm good
I wouldn’t go any bigger. If you go this route, look for an intake manifold off a horizontal shaft engine. The intake running on the vertical shaft engine is already massively long, so the addition of the 90 degree intake creates more issues. I have to run it with the choke half way on for it to run okay. I have a horizontal shaft intake I’m going to install and then mess with the jetting again.
@@ozzyvanhalenroxgotcha I’m running the exact same engine as you and I was also wondering where you hooked up the vacuum line on the pulse pump cus it looks like it’s on the manifold but idk how you did it? Also do you think I should cut the manifold so theres just two pipes and then put a boot and twin carb on it?
@@ozzyvanhalenrox ok so I figured out the vacuum line but my other question was how did you start the engine while it was off the mower, did you use the starting solenoid or did you just hook up a 12v battery to the start and ground and it just started up?
@@zykotic6649 I mounted my own starter solenoid and put power to it. Or you can run power directly to the starter motor with some jumper cables
@@ozzyvanhalenrox if you ran two cables to the engine would you just ground one and then connect the other to the starter and then when it starts remove it?