The saw has consistent spark, starts easy on direct inject mix. Haven't done a vac/press test but will. With asking about pulling "brass retainer", I pulled a small shiny chrome circlip to get to the valve parts(seems like I have dozens of those clips from carb kit parts I've never had to use).Those chinese kits never have it right, the weak point is always the needle, so only the gaskets seem to be worth anything. And that check valve and screen... wow. Did you pull the brass retainer out or were you able to just fish out the valve? Does the rest of the saw check out? (spark, compression, no air leaks etc.)
I very much believe that these saws are very easy, and don't need much to get back up and running.
Most of the time all these saws really need is: fuel line, the check valve, the welch plug and the diaphragms and gaskets-- that's really it. I don't see many people removing the 1/2 plug. They usually just shoot carb spray down the low needle to flush out anything stuck in there. You already have the gaskets, so cut the cost and just reuse the original needle. A lot times you really don't need to replace it as long as the tip isn't deformed and it's still flexible. Now if the needle is completely shot, then you'll have to get the Walbro kit since no aftermarket one really seems to get the needle right.
I tried a spring loaded center punch I picked up specifically for this job. Just a harbor freight under $5 tool. I pushed that punch about 20 times on each one and although I put a nice dent in it, I couldn't get them to pop out. There some YT videos showing guys doing it but I suspect the carbs weren't nearly 50 years old and never removed before. Anyway, I ended up using a tiny drill bit, held the carb up on its side and drilled at an angle to the dents I put in the plugs with the punch. I did nick the carb under the plug but nothing near any thing crucial. Then, with a small pick just popped em out. Take your time if you have to drill and just barely get through the plug, in fact stop just before penetrating the plug. Then use a pick to get through.How did you successfully remove the welch plug? I will need to do the same soon.
The saw has consistent spark, starts easy on direct inject mix. Haven't done a vac/press test but will. With asking about pulling "brass retainer", I pulled a small shiny chrome circlip to get to the valve parts(seems like I have dozens of those clips from carb kit parts I've never had to use).
Does the brass retainer screw out or pull out? Once I get the check valve parts and 2 welch plugs I can button up the carb on this. Then I'll do a v/p test before putting it back together.
any one know a good kit for a mdc carb. I am leary of some kits. I need the whole kit needles, welch plugs, screens, and so on. Some one left fuel in it and we'll you know how that goes. I bought a chem dip for the carb and plan on soaking it and cleaning it all that way. I know I have posted the pick before and was told to get a k1 kit but which kit is full that I need to do this all in one shot. model # of carb is in the pic
I would go with a genuine Walbro kit too, K1-MDC. It's the most complete MDC rebuild kit I know of. The cheapest genuine Walbro kit I found was $16 on Ebay. Still too expensive in my opinion but is your best bet.any one know a good kit for a mdc carb. I am leary of some kits. I need the whole kit needles, welch plugs, screens, and so on. Some one left fuel in it and we'll you know how that goes. I bought a chem dip for the carb and plan on soaking it and cleaning it all that way. I know I have posted the pick before and was told to get a k1 kit but which kit is full that I need to do this all in one shot. model # of carb is in the pic
I got this dip. I read alot on it and it says it is safe. I don't mind buying and little more pricey kit as long as it makes the saw run well. I plan on using my saws. There isn't any point in fixing the thing if it isn't being used. My opinion. I would like to fix all of it however that looks is what I would like to do. You guys know way more than me when it comes to Macs. Most people I talk to say let them die and buy a new saw and I don't really like that answer.Genuine ones are the best way... but man are they expensive at $25 - $30+ each. The K1-MDC has the needle, plugs, screen and clip, but I don't think they include the check valve anymore. While the D1-MDC just has the gaskets and diaphragms, which are available from the aftermarket. (stens or rotary) Now there is still a cost effective way to get it all done at once, but there are steps to take first.
The chem dip should dissolve any gunk in the carb so you won't have to worry about that too much, but what type of dip did you get?
I got this dip. I read alot on it and it says it is safe. I don't mind buying and little more pricey kit as long as it makes the saw run well. I plan on using my saws. There isn't any point in fixing the thing if it isn't being used. My opinion. I would like to fix all of it however that looks is what I would like to do. You guys know way more than me when it comes to Macs. Most people I talk to say let them die and buy a new saw and I don't really like that answer.
Awesome man. Appreciate the help. Going to order the kit tomorrow off ebay. Fingers crossed i will get what they say it isThat stuff seems to work great on carbon, but I've not seen what it does with varnished fuel. I can't imagine any ill effects or it not working. And if the valve isn't included in the kit, just make your own. That alone is the main problem for the MDC.
If you ever need help or have questions, just ask around here. You'll never find a more knowledgeable group than the good-natured guys on the thread. (and we're all mini mac nuts!)
The MDC Isolated Pressure Test Experiment
How do you pressure test an MDC carb?
M
Going to order the kit tomorrow off ebay. Fingers crossed i will get what they say it is
I haven't run across any carbs that take that costly special hose with the flared end yet. Just been lucky so far I guess. I'm able to use standard 1/8id x 1/4od fuel line that is much cheaper.Considering 99% of the problems with MM's are the carbs, and considering how many of them are still out there with nothing else wrong with them except maybe fuel lines, you'd think someone would be re-popping them by now, or at least re-popping a quality kit at a decent price. Same with fuel lines.
This is insane.
https://www.ebay.com/itm/McCulloch-Mini-Mac-30-35-25-110-120-130-Chainsaw-Gas-Fuel-Line/171020663702
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