1990 vro questions 150 hp

[Eshaw150]

i have just took my boat mor the second time ofter partly rebuilt

the 3 cyc was dead andi couldnt afford to rebuild it the right way

the firs problem was hard to start for first start primer was working and the bulb was hard engine was barely running back firing and mising brand new pluigs
got it started and still missing warmed up an run it run ok
over heating alarm went of for right sid of motor standing behind it
took out the thermo stat on the water was pumping water

enginge run cool for rest of time

run it for 2 hours half trottle went to dock to eat lunch
started it back up would not start same thing all over again
got it started and loaded it on the trailer

brought it home check all coils and replaced the champs with ngk plugs
the carbs are leaking gas out the front of them i believe checke comp

starting from the left 1-85
2-83
3-75 has new rings and piston
4-90
5-90
6-91

started the engine with new plugs didnt not even turn over 4 times fired up run petter
should i tear it down and rebuild it and have it resleved


and today i decide to check the lower unit it was kinda of milkey changed it but what weight needs to be used
and what does it take to fix this

and should i rebuild the carbs and resync them

 

[jonesg]

Re: 1990 vro questions 150 hp

I'm not a mechanic and its difficult to understand your writing, English is not your language?

Anyway, I wouldn't go boating until the engine is fixed.
If my overheat alarm went off I wouldn't run it for 2 hrs, I'd bring ti home and fix the problem.

What I would do...?

Have you tried de-carbing the cylinders with sea foam?
It might bring up the low compression cylinder.

NGK plugs are thought to be bad for the Johnsons, I wouldn't use them.

On the lower gear box, milky oil (water) can be caused by the small round gasket seal on the fill screws, mine was milky , I changed the oil and installed new seals and that fixed it. Get some new seals ($1 each) and change the oil.

Get a factory manual from kencook.com
Order rebuild kits for the carbs, it took me 2 hrs to rebuild all 6, just be sure to make absolutely sure the jets are clear, use a small wire to run through the jets. Don't just spray carb cleaner, thats not enough.
I ordered my carb kits from this website, good price and service.
Go through the whole engine, remove and clean all grounds and connections from the battery to the exhaust.

If the compression doesn't come up after using sea foam, pull the head and check for damage, it could also be a leaking head gasket.
Get it right , they are good engines.

 

[Eshaw150]

Re: 1990 vro questions 150 hp

i am thinking about saving the money to buy a new etec any thoughts would be apreaciated

srry about the english i was typing fast

i have already sprayed seafoam through the carb and have also put some in the gas

the had been extreamly overheated before i got it bout it came with a bueatiful boat and trailer couldnt find a better deal

now it does have a fuel water seaperator on it and i have heard that it can cause probs for the v6s and v8

but i think the water pump is going cause when on a plane it does not pump water very efficently at all bearly sprays out

 

[jonesg]

Re: 1990 vro questions 150 hp

Spray seafoam directly into the cylinders and let soak 15 minutes, run on a hose and re-test compression.

if #3 has new piston and rings, has it broken in yet?

If you prefer the Etec, who wouldn't,
put a water pump kit in and run it to death.:redface:

 

[Eshaw150]

Re: 1990 vro questions 150 hp

its got about 6 hours left but its never run has bad as it did that what i did with the sea foam

yea i think im gonna get one as soon as i find a good deal on one

 

[jonesg]

Re: 1990 vro questions 150 hp

You've already got a good engine, get it running right.

Have you considered pulling the head and checking the cylinder walls?
Maybe the head gasket is leaking etc.