GAB Version CHEAP.0 Tecumseh OHH50 172cc 5HP

[chancer]

A guy with 20 yrs of education does not need luck!
GAB Nation!!!!!!!!

 

[bob58o]

Also on a side note:

My 60 year old mother ride my mini bike today.


I rode for hours.

I'm playing poker.

Awesome day!!!!

 

[bob58o]

Note to self:
King Jack suited doesn't beat anything that calls a big bet, even if you 12 big blinds

 

[bob58o]

At some point this main jet has to be too big???????????
Everything I've learned is telling me to go bigger though.

I will go up one more size. 0.051"
Stock was like 0.036"

IS IT JUST ME OR IS THIS RIDICULOUS????

 

[chancer]

Who cares. If it is running better and better and the plug confirms it...
Keep Going.

 

[bob58o]

Here is 1.40mm

0.055"

No Muffler.

https://www.youtube.com/watch?v=2dnm_g3jAT4

 

[bob58o]

Btw

Got some RN4C plugs
Champion 104
$2 each.
I tried to cut one, but didn't get the porcelain out of the threads

 

[bob58o]

So my governor/throttle linkage includes a spring that holds the butterfly open.
This spring resists the governor closing the throttle.
There are multiple holes to put the spring in.

How does this change anything?

A stiffer preload might mean the governor gear would have to push harder (spin faster / more RPMs) to push closed the butterfly??

Anybody know???

I know about rotating the shaft/arm to adjust the governor.

Anybody know if moving these springs and stuff can change the max RPM.


Que the warnings about not overriding the original governor settings, and plastic gear stuff!!!

 

[bob58o]

So after some thinking, this ^ has to be the case. I just wonder how sensitive it is?

I'm going to measure the distances for the different holes.

I think I'd have to stretch the spring an extra 1/4" to reach the hole that I think would allow the most RPMs.

 

[Clifton]

So my governor/throttle linkage includes a spring that holds the butterfly open.
This spring resists the governor closing the throttle.
There are multiple holes to put the spring in.

How does this change anything?

A stiffer preload might mean the governor gear would have to push harder (spin faster / more RPMs) to push closed the butterfly??

Anybody know???

I know about rotating the shaft/arm to adjust the governor.

Anybody know if moving these springs and stuff can change the max RPM.


Que the warnings about not overriding the original governor settings, and plastic gear stuff!!!

There are two metal 'tangs' that you can physically bend back and forth that provide some adjustment, the first has an effect on how far it pulls the spring connected to the governor arm, and the second adjusts the governed idle rpm.

The holes in the governor arm itself that you mentioned will also increase the tension on the spring and allow it to pull harder on the governor arm (the top hole having the most tension), you will also most likely have to adjust the idle tang if you change what hole the spring is in on the governor arm.

It might also be the case that changing the hole on the governor arm could affect how sensitive the throttle is due to the holes being closer or further away from the pivot point on the governor arm, not 100% sure.

That's my understanding of it anyways, I have an OHH60 with the same linkage.

 

[bob58o]

This will be the power plant for a minibike for my nephew.

I got a $150 budget per his mother (plus what ever I toss in besides the engine and TC).

 

[Hellion]

This will be the power plant for a minibike for my nephew.

How old is the young lad, may I ask? I ask because this is a beast of an engine...

 

[chancer]

How old is the young lad, may I ask? I ask because this is a beast of an engine...

Well that question is nill. Because he bought a mini bike with a GX160 for the young lad.

 

[BattleGroundCycles]

fun build you got here. did you end up doing any porting of anything? I looked through all the pages and didn't see any! haha. neat bike for sure.

 

[bob58o]

fun build you got here. did you end up doing any porting of anything? I looked through all the pages and didn't see any! haha. neat bike for sure.

Not yet.

I think I will now that the engine has been pulled.

I have the gaskets so I can remove the governor and P&P.
I will do this and probably get the billet rod.

This will be the power plant for something. I just don't know what yet. LOL

---------- Post added at 04:49 AM ---------- Previous post was at 04:43 AM ----------

How old is the young lad, may I ask? I ask because this is a beast of an engine...

He is a freshman in HS and as tall me. Like 5'10" or 5'11".
Another Nephew is also a Freshman in HS.
The two younger ones are ??? and ??? plus a couple.
They are probably like 5th and 7th grade

Thinking about what I did in HS, time with Uncle GAB on Minibike trails seems much better than 30 packs and zig zags.

I did however get good grades, played sports, and had a job.

I just needed some MiniBike to occupy the rest of my time. LOL

---------- Post added at 04:54 AM ---------- Previous post was at 04:49 AM ----------

Well that question is nill. Because he bought a mini bike with a GX160 for the young lad.

Maybe it is a gx140. The ad says 5HP not 5.5?

 

[bob58o]

The Camshaft IS PLASTIC.

Anybody ever have issues with a Plastic Camshaft?????

I probably don't want to remove the gov. with a plastic Camshaft???
Can't find a metal replacement.

I think I can get Isky to grind a custom HS50 Cam that may work?


What to do?

Hmmmmm??????
https://www.youtube.com/watch?v=5hwUrBgZeUA

 

[Poboy kartman]

Actually....that's a bit different plastic than the governor gears. They are designed to take quite a bit more abuse than the governor gear...they have to work the valve train...not just move a rod.

I haven't heard of anyone running one without a governor...but never heard of a problem with one governed. I'm guessing here...(so take it as an edjucated guess) ...but an original Honda...I'd think it could take it.

Proceed at your own peril however....one thing about a cam failure vs. gov. is that the engine will not continue to run...so what damage it does is a crapshoot.

 

[Hellion]

Is it a steel shaft with plastic lobes or all plastic?

I've heard of some issues with plastic cams, nothing definite--Briggs makes them too for some of their Intek engines I believe. For the Briggs though, you can substitute the plastic cam with the Animal camshaft (all steel) and have everything kosher.

I think the durability issue stems from lack of maintenance/overdue oil changes, overheating and low oil. If the old oil is contaminated with metal particles, the camshaft grinds and wears itself down in short order.

A big part of the cooling system depends on fresh oil for proper cooling.

 

[bob58o]

There is a HS50 Regrind from Isky.

$160 for a single cylinder Regrind.

I may have to purchase the camshaft too, If I can find a metal one????

Dynocams was no help.

Tim Isky will return calls, but it may take months, and it may be a On a Sunday Night.
BUT his Voicemail is full.

---------- Post added at 01:02 PM ---------- Previous post was at 12:59 PM ----------

http://smallenginecams.com/grinding

 

[bob58o]

Only thing metal is the spring for the compression release.
Shaft, Gear, Lobes.... All plastic!