More old sea horse trivia

[brehlers69]

I have a 48 johnson sea horse 9.8. I checked the FAQ's and feel i dont have an answer. I can now start the motor out of the water but the minute i put it in the water it runs for a little bit then stops. What is up. I have followed the directions on the tank for cold start and can start it no problem out of water but under pull it just wont run. I put on new plugs and wires cleaned up the points and the motor, greased and oiled everything i can see and cleaned out the tank.

 

[imtawd77]

Re: More old sea horse trivia

will it not even run in neutral when its in water, or does this only happen when its in gear?

 

[alcan]

Re: More old sea horse trivia

Brandon<br /> You may need to rich the air fuel mixture a bit. It is not a good idea to be running outboard out of water. With most motors this will fry the water pump empeller in as little as a few secs. I know your model does not a water pump, but you sitll need the load on the prop, espeicaly being a direct drive model (no neutral). Try to adjust the high speed needle first at full throtttle. Then idel her down and dial in the low speed needle. I have no idea what the correct begining settings are for these needles. I have fairly good luck with most engines of unknown specs, starting with 1 full turn out for the high speed and two turns out for the low. This usually gets things started and then dial it in from there. A lot of times the taper on the needle gives a clue. The more acute (sharper the needle)taper requires more turns out. The blunter the taper the less turns needed. Think of the needle valves as a fauset.

 

[brehlers69]

Re: More old sea horse trivia

i feel ive tried that with no luck would bad compression be a cause

 

[brehlers69]

Re: More old sea horse trivia

oh and alcan you said you could send me some lit on this my email address is brehlers@yahoo.com

 

[alcan]

Re: More old sea horse trivia

You should have the info now. Yes low compression could be a cause. usually if compression is too low the motor does not want to run at all. Did you test your compression? If so what were the results? This motor has spent a lot of time sitting and not being used. this sitting can cause sticky rings. If compression seems low try a soaking with Seafoam decarb juice in the cyls. over night. I really feel you would be better off with one of the fellas who has first hand knowlage of this model for correct operation. I am not tring to get rid of you, I just what you to get the best info. Please keep us informed as to your progress. Did that lever turn out to be the choke?

 

[brehlers69]

Re: More old sea horse trivia

no the lever seems to be tied to the exhaust. and no i didnt chech the compression and the rings seem to be fine as seen throught the exhaust cover and i poked them and they flex. thanks for the info and the advise i really appritiate the advice no matter what it is or who its from thank you again very much

 

[alcan]

Re: More old sea horse trivia

This lever thing is interesting. I wonder if the size of the tank you are testing in has anything to do with the motor stalling. I wonder about the exhaust relief situation. For some reason I feel your problem is something simple.

 

[brehlers69]

Re: More old sea horse trivia

that would be great if it was i have it in a 55 gallon drum about 2/3 full and im trying to look at the pics you sent to see if it explains the part

 

[brehlers69]

Re: More old sea horse trivia

i cant see them they are just too small can you look i found it under the power head page and i think the # is 23-240 its directly below the opening on the gas tank and has a couple pins running through the top

 

[Chinewalker]

Re: More old sea horse trivia

I worked on a Johnson K-series awhile ago and it had the exhaust tube completely clogged up. It would start on the bench, but as soon as I got it wet, it would not start. The pivot tube, which serves as the exhaust tube, is fairly narrow, and the very rich oil mixes using regular 30 weight (as was the practice 50 years ago) resulted in a lot more carbon build-up than what we see today. If compression is good, then look into the exhaust tube...<br />- Scott