Life Expectancy of a 4 Stroke Engine

[ibdennyak]

Lowracer....missed your post I guess. I....um....took the easy way out. I just backed off the tension nut on the hand throttle, and used the existing cable mounting hardware. Worked very well including the governor. At WOT you can feel the governor acting like a cruise control going up and down the hills. Also, it can be over revved to an extent by pulling the throttle more.

MikeJ, I bought a bunch of off road scooters for the engines, so I had to make my own. I think if you buy just the engine it comes with it. Otherwise.....mine came from Home Depot. It was a Simpson construction part.....1/4 in plate about 8x8 inches. Cost about 12 bucks here....probably about 6 anywhere else. With an angle grinder, drill, and the proper vocabulary they are useful for all sorts of mounting and reinforcement applications. Oooor, in a pinch, they can be used to bolt timbers together.

 

[lowracer]

ibdennyak,
I mounted the throttle cable before I read your post. Your way would have saved me alot of time & frustration (see pic).
Do you think the carb can suck the fuel up about a foot if I removed the stock fuel tank & replaced & relocated it to a lower position?
I think the engine won't look so huge with the tank off the top. Thinking of mounting a Goped tank behind the engine under the air filter?

Thanks,

-Lowracer-

 

[ibdennyak]

ibdennyak,
I mounted the throttle cable before I read your post. Your way would have saved me alot of time & frustration (see pic).
Do you think the carb can suck the fuel up about a foot if I removed the stock fuel tank & replaced & relocated it to a lower position?
I think the engine won't look so huge with the tank off the top. Thinking of mounting a Goped tank behind the engine under the air filter?

Thanks,

-Lowracer-

Noper, most defo not. Ran into the same thing.....remove the tank and it looks like a 50cc. What you need is a pulse carb. Being kind of lazy (on my resumes I phrase it as maxmum utilization of available resources) rather than convert all the linkages etc, I took a pulse pump from a GC something Honda on a pressure washer and plumbed it into the crankcase vent where the tube goes into the air cleaner to reburn the fumes. Then I just hooked up the in and out fuel lines and from there to the carb. Worked fine. I think the engine was like a Honda GC 140 or 160.....4 hp anyway. Another source for a pulse pump is on ebay. Item #140428061906. That one has a little higher volume than the one I used, but a little extra is a good thing. It also has brass nipples. The plastic nipple broke on mine when I wrecked it. That vendor also has a lot of intriguing little goodies that are useable on bike conversions. I'm thinking of their hydraulic brake calipers....pads should last longer than what I am using, and....it's hydraulic.

Hope that helps. If I don't answer your posts just shoot me a PM. I'm in and out quite a bit, and may miss a post sometimes.

 

[Danny3xd]

"maximum utilization of available resources"

Har, lol Denny. I am gonna use that on my resume and in my never ending quest of maxmum utilization of available resources. (Like "borrowing" lines, lol)

 

[Zev0]

Ibdennyak -

I have been away from this forum for a while. Where did you get the engine plate that is displayed in your photo? I should get one...

Thanks,
MikeJ

The pic you are mentioning is not denny's, it's lowracers. You HAVE been away for awhile.

 

[lowracer]

Not sure if the engine plate question was for me?
I mounted the Lifan using some angle iron & flat bar from Lowe's Home Improvement.
I removed the metal foot plate that came on the Lifan & inserted (2) 1/2" thick heavy rubber skateboard riser pads between the engine & the mount for both vibration & to raise it up slightly to clear the bolt heads. Working out real well...(see pics)
-lowracer-

 

[loquin]

FYI - I believe Walbro (among others) makes an add-on diaphram fuel pump for single cylinder engines. With it, you should be able to relocate the fuel tank up to several feet below the carb...

 

[Old Bob]

Yes walbro makes a pump.

 

[chrisnbush]

If Hua Sheng "dies" suddenly, check OHV

Just noticed this. I had mine die, took the carb off as I was getting spark, etc. etc.

Finally out of desperation, removed OHV cover, I had adjusted the valves at one point, though I might have messed something up.

What happened is the pin that the valve rocker sits on had corkscrewed out, dropping the input rocker. So the input valve wouldn't open which is certainly an engine killer.

I now have a little block of wood pressed in holding a piece of metal against where the pin slides out, so it won't.

IF a HuaSheng dies suddenly, this can be one of the reasons. Heads up

cb

***************************************

theres fourstrokes over 100 years old that run.
theres two strokes over 100 years old that still run.

i still use a 30 year old 2 stroke brushcutter. no reason to get rid of it. thats 2 years older than i am!

onto my fourth chainsaw(2stroke) in three years.(2 oil pumps dead, one engine dead)

i had a huasheng fourstroke die for no reason after 500 km... ive got an os26 fourstroke that sat in a pine plantation for years unknown and runs beautifully now...

its a stupid question that is relative to the observer.

how much do you pay? how good are you at maintenance? how hard do you use it? how often? what types of fuels, oils are you using? what brand is the engine? is it stock or modified? do you garage it or leave it outside in the rain? what environment are you running it in? do you complain that its useless when something minor like a plug cap fails or a carbie springs a leak because you cant fix it?

 

[HeadSmess]

aye....the huashengs strangely running again...

i stripped it completely, found nothing wrong....started back up, and...it was still bad!

so i left it spluttering away for about 3litres of fuel.... and now its fine again?

my verdict?

i had the valve clearance to tight. (threw me cus it was fine for at least a week after adjusting) then the ex valve coked up, preventing a complete seal.
then, when i stripped it...i just guessed the clearances on re assembly. loose! so the carbon on the seat must have been bashed and burnt off eventually with some running.

cus yes....now its like new again.... and i have been prodding my braIN FOR ANSWERS! and other ppls brains! even me mate, a 70yr old mechanic is bamboozled!

it runs...all good. bye bye 2strokes!