115 Johnson OB

[booda]

I just bought a boat w/ a 78' Johnson 115hp outboard. My first couple of times out went fine. Now it starts, idles and runs at low speeds just fine. When I give it full throttle I get no response, just the same slow speed, no engine rev., no sputter just slow speed. Ive checked the plugs, put on new throttle cables, sprayed the carbs w/ cleaner - no change. Any ideas???<br /> <br />thanks, bill bill@widomaker.com

 

[JB]

Re: 115 Johnson OB

Hi, Bill.<br /><br />Is the throttle opening the butterflies 100%?<br /><br />Is the throttle advancing the timing plate all of the way?<br /><br />Let us know.

 

[booda]

Re: 115 Johnson OB

Ill Check that out tonite...

 

[fishingsalt]

Re: 115 Johnson OB

you also may want to check the fuel pump diaphram<br />for cracks also the coil may not be able to get the kv up high enough!<br />STILL FISHING!

 

[DJ]

Re: 115 Johnson OB

Booda,<br /><br />You said you put new cables on. When did your problems start?<br /><br />With the cowl off, you should be able to see things happening when you shift from nuetral to a gear and then advance the throttle.<br /><br />On cable will move the gear shift and the other will move the throttle linkage. Make sure this is happening.