hello how are you

im from Panama im Helping a Friend with this Thread
he have a Crrc 50cc for about 2 Years , but the last few Weeks the Engine start to loose Power , we can not Get more thar 6200RPM of the motor and when is full throtle the Engine have some Bubbles and the rpm goes up and Down but no more than 6200, before this Last Weeks the Motor get about 6800rpm 7000rpm

he is Using 20x8 PROP SO is a Little prop for the Engine
we check all the Motor Bolts , check the Fuel Lines, the Plug Gap,

Also when we Play with the Needles a little touch and all the Setting Change is so sensible

he gonna change the Carburator Gaskets and the Main gasket on the Motor Piston to see if getting Air- also gonna Check the Fuel Tank



if some Knows something else or have some Idea Please

im about 6 Years Using Gas Engines only DA so Never Have a problem like That

thanks for the Help

Someone?????

thanks

check the ignition and everything related, connections, battery, switches, etc, etc.

If your already taking the carb off, give it a good cleaning, especially in the catch screen, might have some crap in there. Ive also seen this happen from a bad spark plug.

If everything was working okay up until now and it's been 2 years along with bubbles that you said was seen, I'd be looking at the clunk line inside the tank and make sure it's sitting at the back and bottom of the tank. Sounds like maybe the clunk line might be sucking air at times.

Scott

"...Engine have some Bubbles..." - agree w/ Scott...while you're replumbing the tank, i recommend viton for the pickup line and a walbro felt filter for the clunk.

Originally Posted by kenhiraihnl

"...Engine have some Bubbles..." - agree w/ Scott...while you're replumbing the tank, i recommend viton for the pickup line and a walbro felt filter for the clunk.

ive been thinking about this. do you think the felt clunk filter would flow enough fuel for a 150? i havnt dont it simply cuz i figured it would be to much restriction.

[QUOTE=chancho;1750123]ive been thinking about this. do you think the felt clunk filter would flow enough fuel for a 150? i havnt dont it simply cuz i figured it would be to much

go to your local small engine repair shop...the walbro-type felt filters come in different sizes...the one I use on my 100cc is huge, but still fits through the opening in my Fiji water bottle tank...This is the clunk I use. It says "up to 80cc", but i'm positive that there will be no fuel restriction with 1/8"-ID fuel line. good luck on helping your friend, and let us know how you solved the problem and found the lost RPMs.

hello Jonathan, did you guys figure out the problem, or did you just decide to put that motor on the bar top of the hotel washington in Colon?

Originally Posted by chancho

ive been thinking about this. do you think the felt clunk filter would flow enough fuel for a 150? i havnt dont it simply cuz i figured it would be to much restriction.

Easily and then some. The smaller 30cc size filter is plenty big enough. So is a 3/32" fuel line but most way over plumb their engines.

Originally Posted by Unmanned

Easily and then some. The smaller 30cc size filter is plenty big enough. So is a 3/32" fuel line but most way over plumb their engines.

Plus the 3/32 line fits most fittings tighter, less chance for air leaks.