'93 Evinrude 25 hp rrrrrhicrrrrrhic

[WaltL]

95 evinrude 25 hp. Carb is clean, new plugs, new gas, bulb and hose. Starts easily, runs great at<br /> 1/4 to wot. Get strong spark at plugs, pulled one plug at a time, no "serious" difference. Plug inspection<br />shows wet plug on top and dry sooty one on bottom. Will do compression check tonite. The hic sounds<br /> like there is no fire during that cycle. but is continuous rrrrhicrrrrhicrrrrhic. is allowed to idle down, the<br /> hic causes engine toi die. Easy to restart tho.<br /><br />Let me know

 

[JB]

Re: '93 Evinrude 25 hp rrrrrhicrrrrrhic

Hi, Walt.<br /><br />Welcome to the board.<br /><br />Let us know how your compression check comes out.<br /><br />Good luck.

 

[Joe Reeves]

Re: '93 Evinrude 25 hp rrrrrhicrrrrrhic

Walt..... The usual cause of that probelem is: if that carb has a adjustable slow speed jet, it's set slightly lean. If no adjustable jet, the carb is still slightly fouled.<br /><br />One other cause would be that you have the throttle butterfly opening slightly too soon in relation to the timing.

 

[bob-o p]

Re: '93 Evinrude 25 hp rrrrrhicrrrrrhic

i agree with joe i've seen many motors with the same symptom of the "hiccups" or "sneezing" and tuneing the carb is the solution

 

[WaltL]

Re: '93 Evinrude 25 hp rrrrrhicrrrrrhic

Thanks for the replies. Houston traffic and central standard time postponed the comp check. will cert get it done tonite. The idle adjust screw is in the tiller handle and it turns without apparently changing the needle. will chck tonite also<br /><br />walt

 

[WaltL]

Re: '93 Evinrude 25 hp rrrrrhicrrrrrhic

Compression in both cylinders is a perfect 120. The new plugs, less than 30 min run time, one is slightly damp, but clean(top) and the other is black and sooty. Switched plugs and removed after a few minutes, same results. top wet, bottom dry and sooty. Still hiccing.

 

[G DANE]

Re: '93 Evinrude 25 hp rrrrrhicrrrrrhic

Hi Walt L<br /><br />Try to unscrew your fuel pump from block and replace the two screws on pump. Squese primer bulb firmly. If fuel drips out of vacuum hole on back of pump, you have a leaky diaphrame, feeding fuel to top cylinder. Rebuild. Error can also be loose screws on intake cover carb is mounted on, feeding lower cylinder with air through airleak. Usually plugs ARE damp when iddling, and as you have only one carb, the lower must get air from some leak, instead of proper micture. Reason symptom dissapears at higher RPM is that leak cant feed more air