i'm new on boat Johnson outboard 150HP

[nguoi_viet41]

Hi i am new for this
yesterday i spend 1/2 day to read all the posts that i hop i can use
but i am so new for this i need to ask
friend of my just got an old boat with 1979 150 HP Johnson outboard
when he got it the old owner tell him it Johnson 150 hp V6 outboard

my questions
how do i check and change engine oil and what type of engine oi i need to change?
how to add trim oil what type of oil for the trim? (because check no oil in the trim at all engine can not up or down using trim)

thanks

 

[mikesea]

Re: i'm new on boat Johnson outboard 150HP

the only oil you need to change is in the lower unit,you will find 2 screws that look alike,one on bottom ,the other above it on the right side of the lowerunit,,you can buy lower unit oil at any boating store,you remove both screws and using the tube you but with oil squeeze into bottom hole til it flows out the top,put top screw back first then bottom,does yout trim and tilt make a noise thats sounds like it is running,if so try to help the motor up by hand while someone pushes the up button,if that dont work,there is a screw in a hole on the right engine mounting bracket,loosen it ,it will not come all the way out so dont try and take it all the way,this is a manual relese valve,when loose,you should be able to lift by hand,its hard to do from inside the boat,then look for the large screw on the round resivour that holds the fluid for the trim unit,you can use automatic trans fluid,fill til it flows out,trim up and down a few times and refill,if your engine has the vro system and is being used,you should have an oil tank on the boat somewhere,if no tank you have no oil injection so you need to mix you oil with your gas,1 pint of 50-1 oil to 6 gallons of gas

 

[nguoi_viet41]

Re: i'm new on boat Johnson outboard 150HP

mikesea thanks for your times

1st the boat was try to fix it from another friend he try to lower the trim
the trim motor did make some noise but not do anything so what he did he rain the oil out
then the week later i come and try to help i think the reason the trim not work because he used the bad battery
now i run in problem need to fill the trim oil

the boat was not used for long years i spend 3h to clean the gas tanks and gas line final the boat can start but found out from the other owner say the boat need to replace the water pump and uperrunit clog water can not flow i don't know how to remover the clog problem and don't know how it clog
will take a look some time this week

 

[mikesea]

Re: i'm new on boat Johnson outboard 150HP

You need to buy a service manual to help you .I (we)will help all we can.But if the motor didnt run for a long time The carburators are probably dirty from old gas .Yes the impeller and maybe the whole water pump needs changing.You can take a small piece of wire and push into little hole water comes out,that may fix problem.But if water pump is bad,little or no water will come out.The manual has all the pictures and explaines what tools to use.

 

[nguoi_viet41]

Re: i'm new on boat Johnson outboard 150HP

yes i will get service manual for it and i will come back for more reading and more questions if i have


thanks

 

[nguoi_viet41]

Re: i'm new on boat Johnson outboard 150HP

You need to buy a service manual to help you .I (we)will help all we can.But if the motor didnt run for a long time The carburators are probably dirty from old gas .Yes the impeller and maybe the whole water pump needs changing.You can take a small piece of wire and push into little hole water comes out,that may fix problem.But if water pump is bad,little or no water will come out.The manual has all the pictures and explaines what tools to use.

1979 Johnson outboard 150HP

trim fill up with with automatic trans fluid it gave me some problem fluid leaking at the line connection final i have it fix

check water clog upper case i open both thermostats and used water hose
let water in from thermostats i see some water come out in lower unit

the Engine gave me problem today can not start i have to take off the carburators clean use carburators cleanner and air compressor blow it then put it right back
i used ez staring fluid spray in carburators it start and i let the engine run a bout 4 mins the engine star getting hot i stop it

don know what to do because the old owner say he just replaced the water pump and he say upper unit clog
anyway i need to see is any thing clog in water pump so i take off the lower unit i used piece of wire and push into little hole did not see any clog the water but nothing in the way
i may need replace an other water pump ?

 

[Benny1963]

Re: i'm new on boat Johnson outboard 150HP

make sure the water tube grommet goes into place
check impellar and plate .change both thermostats and popett valves
flush motor from water tube up with thermos and popetts out

 

[nguoi_viet41]

Re: i'm new on boat Johnson outboard 150HP

today i remove the lower unit 1st i check the water pump it look new to me
then i make sure no water clog in water cooler system
i used air to blow in a small plastic water hose where is the water come out from the engine i can see the air come out all the way to the bottom pine where is the water pump connect to.. this mean nothing clog the water system.
then i just put back the water pump and lower unit back and test
unlike 2 days ago this time the engine run cooler and i can see water come out from a small plastic water hose i think the cooling system oke

why i can not start the engine with out using e-z starting fluid?
the engine run i let it run for 7 mins
other problem i get is some water come out from the head @ 4 broken head bolts i can only take 2 broken out the other 2 bolts can not see and it @ the bottom


thanks all for helping me

 

[nguoi_viet41]

Re: i'm new on boat Johnson outboard 150HP

engine still can not start

today i test the compressor what do you think?
I Dont know what is piston number 1 it is v6
1 compressor 100 PSI
2 compressor 80 PSI
3 compressor 80 PSI
4 compressor 98 PSI
5 compressor 90 PSI
6 compressor 40 PSI

 

[Benny1963]

Re: i'm new on boat Johnson outboard 150HP

the motor has some compression issues most of those numbers are bad if you have beoken head bolts you may as well remove heads and inspec plate on side of the holes with lowest compression what you will find on several of these holes will be scorring probaly from overheat ring damage posiible warped head sound like you may want to inspect cyls with heads off before you spend any more time chaseing problems that will cost you money
motor probaly needs rebuild and its costly 2500 on my 150
good luck you could part out and put money towards another motor ?
good luck

 

[nguoi_viet41]

Re: i'm new on boat Johnson outboard 150HP

thanks Benny1963 for your help

what is the good compressor (PSI) for the Johnson 1979 V6 150 HP?
what is the gap for the spark plugs in (inch)?
and what is the float drop diementsion?

 

[jonesg]

Re: i'm new on boat Johnson outboard 150HP

thanks Benny1963 for your help

what is the good compressor (PSI) for the Johnson 1979 V6 150 HP?
what is the gap for the spark plugs in (inch)?
and what is the float drop diementsion?

The commercial versions of the V6 are designed with lower compression, they run slightly slower and use bigger props, mine (1994) are all around 90psi.
More low end torque and use cheaper fuel.
http://image52.webshots.com/452/1/30/52/2002130520101354590FVwtzo_fs.jpg

The broken head bolts are likely causing the low compression, so I'd assume it to be good until proven bad. Did you post the engine serial number yet?

 

[nguoi_viet41]

Re: i'm new on boat Johnson outboard 150HP

jonesg

if i have time i will try to take off the broken bolt install new bolt and retest compression

thanks all

 

[nguoi_viet41]

Re: i'm new on boat Johnson outboard 150HP

i have a INTERTECT service manual i look at table power head torques and spark plug gap it did not clear to me can someone help me tell me
what is the gap for spark plug (inch)?
what is the torques lb for the head bolt ?
what is the float drop dimention? my carb flooding
another thing i can not find the spec for piston compressor (psi) in the service manua.
The head bolts sequence i know
for my 1979 johnson 150 HP OUTBOARD

THANKS ALL

 

[nguoi_viet41]

Re: i'm new on boat Johnson outboard 150HP

i try to get two broken bolts out but no luck

good post from iwombat Johnson/evinrude adding a tell tale

i try to get this broken bolts out but no luck too

do you think the two gasket cause the low compressor and water get in to piston?

the right gasket it look to me blow gasket cause over heat

 

[nguoi_viet41]

Re: i'm new on boat Johnson outboard 150HP

 

[iwombat]

Re: i'm new on boat Johnson outboard 150HP

Those head gaskets tell the story - both are blown. You're probably best off taking the block to a machine shop and getting those broken fasteners out. You might try drilling them out with a set of left-handed drill bits if at all possible.

 

[Benny1963]

Re: i'm new on boat Johnson outboard 150HP

have someone remove them or helicoil if needed ,i use my automotive machinst ,for bolts and stuff usually 20 a piece check heads with strait edge to make sure there not warped or you can pay shipping and i will send ya
a pair free ,getting rid of some of my stuff from 149 cid crossflow if any of yall need it

 

[jonesg]

Re: i'm new on boat Johnson outboard 150HP

MAchine shops deal with broken bolts easily and usually cheap, just don't put an EZ out near it.

There are no PSI numbers in my manual either and its a factory Johnson manual but I'm told they are typically around 90-100 psi.

 

[nguoi_viet41]

Re: i'm new on boat Johnson outboard 150HP

thanks all your helps

final i did take out the two broken bolts and put new two head gasket
re test compressor see picture below