In Trouble Again

skip44820

Petty Officer 2nd Class
Joined
Dec 13, 2020
Messages
174
A while back I ran across a 1986 2 stroke 25 hp Merc, electric start, with cables. I had the carb off couple times, finally I soaked the carb parts in a Napa product and ordered a carb kit. I could not get it to idle before the carb kit nor after the carb kit. Finally I sent the carb out to have it done by a professional at $122. Well it came back and I took my time and put it back on with high expectations and now I can't get it to even fire. While I had the carb in the shop I took a look at the reed valves and I could c a small amount of light so I reversed them and got rid of the light . What the hell happened? Due to the frigid temps here in Ohio I had the motor sitting in a tub of water in the unheated garage, Did my leaving it in the ice cold water or sitting over a 20 gal. of water cause a problem or did the reed valve turn around do something. This motor would be hard starting and would not idle now with rebuild carb it wont even fire.
I got good spark. I didnt take a compression test now but I did when I brought it home 3 weeks ago. I no u r not supposed to use starting fluid on a 2 stroke so I shot a little gas in the front of the carb so I no its getting fuel. Still no fire in the hole> HELP!!!! and Thanks as always
 

Sea Rider

Supreme Mariner
Joined
Sep 20, 2008
Messages
12,345
Reed valves usually have gap tolerances which are measured inserting metal shims between the rear valve body and the flat surface they sit against. If there was a bit of light seen when checking the reed valve assy against a light source seems was the factory gap given to them. Should never reverse reed valves may end breaking some and the motor swallowing them with awfull consequences.

Need to get the service manual in which the reed valve gap should be stated there or buy a new reed valve assy at around 150 bucks. The carb pro definitely was a tree shade mechanic doing a lousy work on your carb...

Happy Boating
 

skip44820

Petty Officer 2nd Class
Joined
Dec 13, 2020
Messages
174
I will remove the carb tomorrow and put the reed valves back like they was. I will update u. Thanks
 
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