Evineude 150HP help (1988)

[jaurora]

Here is the story. I was in search of a motor for my boat and came across someone selling a 150 Evinrude 1988. This motor was sitting on the side of his house for how knows how long. Me not knowing the overall condition of the motor I brought along my comprssion tester to check the cylinders as the powerhead is my biggest concern as this is one of the most costly items to replace/fix. So the compression was an even 100 on all 6 cylinders, i think one cylinder may have been 101. So with those readings i purchased the motor.

After hanging and bolting up the motor I did not even attempt to start it. I pulled all 3 carps off, took apart and cleaned them. Replaced all 6 plugs, dropped the lower unit to replace the waterpump/impeller assembly, changed the fluid in the lower unit and put it all back together.

Since I hear so much bad out of the VRO system I decided not to use it. I will run the premix just like my other motor. So I just connected the gas line to the engine and left the oil line off. I disconnected the 3 wire harness coming off of the VRO pump under the hood.

So now its time to keep my fingers crossed and power her up. She took a little bit to get going but she turned over. Was running a little rough and at a high RPM so I shut it down and kept playing with my teleflex adjustments, along with the linkage adjustments and so on. So now she starts but I just cant seem to get it right. She seems to idle on the low side and want to stall and usually does, when I kick up the throttle a little bit using the adjustments, the slightest turn will make it race to much and it is still a rough idle. The motor seems to be smoking alot as I am assuming that there may be left over oil in the injection system. I know I was having issues with it starting but when I turned the red switch on the primer/choke, it would start right up but it would start popping at the exhaust and sound like it was misfiring untill I flipped the red switch back and the popping stoped with the motor still having a rough idle.

So my question is, is there anything you can think of to help make it idle smoother, did I disconnect the wrong harness? I have the Seloc manual but it wasent much of help as this website would be. Any suggestions on what to check?

Thank you,
Jeremy

 

[mikesea]

Re: Evineude 150HP help (1988)

remember,you are running oil rich,that could be a bit of a problem until the oil burns out,and your plugs clear,that should not tak too long depending on how much was left in the lines and vro ,the other thought,when you did your carbs,did you soak em to allow the interior passages to clean,its not just the bowl and parts you can see ,most importantly is the interior of the carbs,did you remove the jets,taht allows more carb cleaner into the carb ,be sure your sinc and link on the carb linkages are right,also check that the timer base under the flywheel is connected to throttle and rotating without sticking,that needs to move in conjunction with throttle

 

[jaurora]

Re: Evineude 150HP help (1988)

Thank you for the information. The carps were stripped. They did have some gunk buildup but not to much. I am trying to rule out the carbs all in all. I pulled the jets as well.

What is the correct way to disconnect/bypass the VRO system? Did I do this right? Do I need to plug the oil inlet?

I do need to do the sync in link that I hear so much about I will surf this forum in hopes to find info on that. I am also going to have to look into the book to see what the timer base looks like. Is this something that can be seen without removing the flywheel? I know this is a dumb question and I problably looked at this part 1000 times, just need to learn what there called.

thank you,

 

[mikesea]

Re: Evineude 150HP help (1988)

no dumb questions here,the timer base ,can be seen well enough to see that its working,follow the connecting linkage on top of the throttle lever and see where it connects,if for some reason the linkage is missing it could have fallen into the engine cowling,its a short rod with a couple bends,plastic balls on each end,those balls will slip into plastoc sockets on the throttle arm and timer base,jst move the throttle arm and be surethe timr base rotates ok,as for vro,you did o,you can put a plug ,be it a screw wood dowel and zip tie it into the oil line ,you can cut the line a few inches down from where it enters vro and plug it ,dont know how necessary it is,but its suggested

 

[jaurora]

Re: Evineude 150HP help (1988) new question

Re: Evineude 150HP help (1988) new question

Well finally got her runnig decent in the barrel and need to take it out on the water to do some more adjustments. Another question I have is it is smoking alot, seems to be burning to rich. I have been mixing the oil and gas for years on my 70 and it smoked but not like this. I pulled the plgs and they seemed wet with alot of oil. I am not sure if there is an adjustment or what as the VRO system is disconnected or if it has something to do with the motor sitting on the side of the guys house for over a year and just needs to run.

Second I metered the motor and noticed that it is not charging. I checked the tach and it seems to be fine. Since the motor was sitting there was moisture under the hood, so I am assuming possably the stator might have rusted a little. I am going to pull the flywheel tonight just to look but do you think this could cause the non charging? I only metered about a 1V output at idle.

Thanks,

 

[emdsapmgr]

Re: Evineude 150HP help (1988)

Engines smoke a lot when they are running cold. The thermostats on that engine open at 143, so the temp on the head should be 143-150 normally. Possible one or both of your thermostats are stuck open,causing too much water to cool the engine. Also, if the pressure relief valves in the thermostat are melted, they can also flow excess water. Check the temp with a laser gun to be sure if it is warming up to normal operating temps.