1978 Johnson 85hp Javelin

[jasperastro]

Tonight i have reached the final stage of getting my motor into shape. In the yard here at the house i repaired the fuel lines and replaced filter and gaskets in the system. The motor runs well except for a little smoking, burning off the bugs. I put b-1 in the fuel system and it seems to be running better as it gets warmer. Fuel pressure is great, ball is hard as a rock, doing good. I have the motor connected to a muff, water going into the system well. When i put the motor into gear and rev up slowly, i have water coming out of only one exit hole from the water pump discharge. Being hooked up to a muff would this limit water intake into the system? Being the motor is not submurged would this limit the intake?<br />Motor runs well and water is coming out of the discharge, indicating proper impellar operation, just coming out of one hole, is this normal, or does the motor have to be compleatly submurged to achieve maximum intake?<br />I have come a long way rescuing this boat and motor from a 3 year lapse in operation. <br />I got a good deal, and everything indicates the fellow that had this boat took care of it, God rest his soul, and he is watching me every step of the way.<br />Thanks for anything......jas.....

 

[Dhadley]

Re: 1978 Johnson 85hp Javelin

Welcome!!<br /><br />The water deal sounds OK. The thing I noticed was that you didnt mention carb kits nor a water pump kit. You may have already done those -- after sitting for 3 years, that would be a real good idea. <br /><br />Good luck!

 

[jasperastro]

Re: 1978 Johnson 85hp Javelin

I had the carbs cleaned and the pump checked, its not damaged or worn, it is virtually brand new. <br />The Man that had this boat took very good care of it, up untill he became ill and passed away.<br />I was just wondering why water was coming out of only one discharge hole , seems odd but i think not being totally submerged has something to do with this. <br />Thanks for the help, i will be finishing up today for the maiden voyage in the morning.<br />The ss minnow......jas.....

 

[Terry H]

Re: 1978 Johnson 85hp Javelin

Jasperastro...have you checked the thermostats?<br />I'm not sure on the '78s but later year crossflows have 2 of them. On my '79 when I run in tank one side spits water 30 seconds before the other...is it possible that you have a bad thermostat? just a Thought

 

[jasperastro]

Re: 1978 Johnson 85hp Javelin

Thanks for you reply.<br />I had the chance to take it out on the water today. The motor ran alittle rough at the start, after warm up. Once i began gradually increasing the throttle it took right off. <br />Water was shooting out both discharge holes at a steady pace depending on speed.<br />Once the B-1 Chemtool cleaned out the bugs in the carbs it ran like a top. <br />Before this it seemed to be very sluggish,holding the throttle down it would only do so much no matter what.<br />After letting it high idle for a while, then putting it in gear it took right off with no problems. It seemed the fuel had some trash or the carbs were a bit dirty.<br />One other thing i noticed was the amount of steam coming from the discharge holes while it was idling....water was still coming out a little and it idled just fine. The temperature here was in the upper 50"s , water temp was 72". Is this normal? <br />Thanks Again, ill check with ya later....jas....

 

[jasperastro]

Re: 1978 Johnson 85hp Javelin

Does anybody know if this motor has any kind of alarm system?<br />1978 Johnson 85hp Javelin Sea horse?<br />Also i have been surfing around for bunk board mount brackets that have the pin going into the holes mounted on the trailer. Iam having problems locating these. They support a 2x6 bunk board on a Red River Custom Boat Trailer. <br />Any Ideas? ....jas....

 

[Xcusme]

Re: 1978 Johnson 85hp Javelin

Jasperastro ,<br /><br />You mentioned 'Steam' from the discharge holes. Do yourself a favor and replace the impeller pump and check/replace the thermostats. It would be a shame to loose the motor by not replacing these serviceable items.

 

[jasperastro]

Re: 1978 Johnson 85hp Javelin

I did not know if the steam was a problem or caused by the temperature difference in the water and air. The impellar seemed to be working fine, discharging water at a regular pace. I put my hand in the flow of water and it was warm, not boiling or too hot to touch. <br />The motor ran great, after getting the bugs out of the fuel sysyem. <br />Is it pretty hard to change out the impellar?<br />Or would it be better to let the boat shop check this and also check the thermostats?<br /><br />Thanks .....jas....

 

[Xcusme]

Re: 1978 Johnson 85hp Javelin

If the discharge water is warm, then you're OK. If it was steam, that's a problem to be fixed in a hurry.<br />Replacing the impeller or thermostats is an easy job with a service manual and simple tools. Stop back if you need any additional help. I prefer to do my own maintenance, that way I'm sure the job is done right. I'll guess most folks on the board feel the same way, but that's a personal decision based on time and ability.

 

[Cricket Too]

Re: 1978 Johnson 85hp Javelin

jasper....I think the discharge holes your talking about are the exhaust pressure relief holes. When your running on the muffs there is no exhaust backpressure so there is usually not that much water coming out of the exhaust relief. I would also recomend changing the impellar, as suggested, the blades dry out even if it is not in use and it's better to be safe than sorry, it's an easy job. Good Luck.

 

[jasperastro]

Re: 1978 Johnson 85hp Javelin

I just talked to a service tech from the local boat shop, lucky to catch him at home.<br />He told me that if i had water constantly running from the small discharge hole my pump is working.<br />The two discharge holes on the back only will expell water when the boat is in gear moving or coming from out of gear to neutral, and will eventually stop while idling out of gear. <br />As far as the steam coming out of the two discharge holes on the back,He said that was exaust, and it being warmer than the air would make it look like steam. he believes everything is ok, but recommends looking at it anyway. <br />Time to get out the tools i guess, i just dont see paying that kind of money to replace a 15.00 part. Well thanks guys......here we go....

 

[Ross J]

Re: 1978 Johnson 85hp Javelin

jasperastro, that motor has an overheat alarm mounted in the remote control consul. It makes a heck of a lot of noise when the engine overheats.<br />I run the same motor and the "Steam" you mention is apparent on mine also even though I have just fully serviced the lower unit. On closer inspection I found it was just water fogging and comming out as mist rather than steam.<br />Keep us informed how you get on.<br />Ross

 

[jasperastro]

Re: 1978 Johnson 85hp Javelin

Thanks for the reply Ross.<br />Its puzzling how motors do different things. <br />I know if something was going to happen to the motor it would have pretty quick. <br />Everything looks good so far. <br />I will keep you posted on whats happenning.

 

[jasperastro]

Re: 1978 Johnson 85hp Javelin

Update....Serviced lower unit, found that impellar is new....2 1/2 years new. Looks good and stable. <br />Took boat out again, no steam coming from exaust relief holes on back of motor. Temp outside 85 degrees, river water temp, 76 degrees. Humidity at 80%. plugs look good, slight residue on lower right and left plugs. Fuel screen clean.<br />Water coming from small exit tube, side of engine coming out at steady pace. Water from exhaust relief coming out good while in gear running down river. Stops coming out when engine sits in neutral a while, but small hole constantly flows.<br />Having one problem with fuse off the solenoid for the tilt....blows fuse on occasion.<br />What is the proper hook up to batteries?<br />I have engine crank, and tilt and trim on the same battery. Trolling motor, depth/fish finder, bilge on deep cycle battery.<br />Starting motor is hard at start, turning key on and off till takes hold of flywheel. After that it starts with one turn of the key, after engine is warmed up. Looking for short on starter, cant find...wires are all good to starter, clicks up after playing with it a few times at first start up.<br />Still trying to find bunk board posts that fit into slots in trailer, 2x6 boards, carriage bolts connect into bracket that has pin on the end of bracket, that slides into square hole....any ideas?<br />Thanks for the help.....jas....