Johnson 130 Left Bank normal, right bank HOT!

[chopperguy]

I have a good one for you guys. Just finished putting headgasket on right bank of 2000 J130PLSSS. New thermostats on both sides. Cranked it up and right bank proceeded to get hot so I shut it off. I removed and tested the thermostat and it's good. I cranked it again with thermo cover removed and discovered no water is getting into the right bank water jacket. Indicator tube water is following normally. Also, when I had the head off I made sure water passages were clear. I don't have a clue what could be wrong. Any ideas?

 

[chopperguy]

Re: Johnson 130 Left Bank normal, right bank HOT!

Here's some more info. I back flush the motor through the pisser tube and water flowed freely out the thermostat opening. Started the engine again and water began flowing from thermostat housing this time and conitnued to flow. Shut engine off reinstalled themostat and cover. Restarted and right bank getting too hot again. Removed themostat and cover, no water. Something is blocked somewhere. Anyone going to chime in?

 

[chopperguy]

Re: Johnson 130 Left Bank normal, right bank HOT!

OK I guess know one has any idea.

 

[boobie]

Re: Johnson 130 Left Bank normal, right bank HOT!

Did you recently have a water pump failure??

 

[chopperguy]

Re: Johnson 130 Left Bank normal, right bank HOT!

No, just got done inspecting the water pump impeller which is only a year old. It looks brand new. Never had this problem until I did the head gasket change. I don't see what the head gasket could have to do with it. There has to be some logical explanation.

I guess i need some insight on how the water flows from impleller to water jacket. The problem should be there.

All I know is it's summer time and I'm not going to on the water til this is fixed. Bummer.

 

[watergecko]

Re: Johnson 130 Left Bank normal, right bank HOT!

Are you sure the head gasket is positioned correctly?

 

[chopperguy]

Re: Johnson 130 Left Bank normal, right bank HOT!

Are you sure the head gasket is positioned correctly?

Gasket was marked which side goes toward head. There's really know way to position it wrong. How could this effect it?

 

[drindeale]

Re: Johnson 130 Left Bank normal, right bank HOT!

I wont profess to being a marine mechanic but have worked on several outboard marine engines large and samll- to include blown headgaskets. (plus I have stayed at a holiday inn recently)

First curious of why you replaced the head gasket? Did the right bank head gasket blow because it got too hot and then you replaced it? (Lack of coolant to the head as you know will make the head gasket go bad so maybe the water problem was a pre head gasket issue.) In any event Two areas come to mind.

One being water flow from your pump to the cylinder water jackets. Just because you have water back flushed through as you call it the "pisser tube" and form another source then the water pump doesn?t mean the water pump is supplying water to both heads, and in sufficient and equal quantities. There are tubes that run from the water pump at the lower unit up to the power head. Are both of these clear, connected properly and not defective? That?s where I?d look first if your not getting water to the one side.

The second is w/o water the head gasket on the right bank will go bad again. If you didn?t overheat it too much it may still be good. If you do get or have enough water flowing to it, a blown head gasket even with sufficient water will cause the engine to overheat.

Anyway my 2 cents for what its worth.

 

[emoney]

Re: Johnson 130 Left Bank normal, right bank HOT!

Sounds like the rubber diverters, under the head, may be misaligned. Could've gotten jostled during the re-install.
Also, "left bank" = "port" , "right bank" = "starboard"

 

[chopperguy]

Re: Johnson 130 Left Bank normal, right bank HOT!

I appreciate all the leads from you guys. I just checked the starboard bank cylinder compression. Only reading 105psi from both. the port bank reads 122psi both cylinders. Is it possible the new head gasket I installed didn't seal and i'm getting blow by into the water jacket? This would create pressure in the water jacket and keep the water from getting in. This would explain why when I remove the thermostat cover on the starboard bank water flows in there freeely because there's no pressure.

 

[chopperguy]

Re: Johnson 130 Left Bank normal, right bank HOT!

Still need help with this! Since last post I have removed the head again and checked for flatness and reinstalled new head gasket. Replaced the thermostat again. No luck. When the thermostat cover is removed water flys out of the opening while running so water is getting into the water jacket. As soon as the cover is replaced it gets hot again. I don't know what to check now.

 

[AlTn]

Re: Johnson 130 Left Bank normal, right bank HOT!

is the pressure relief spring on the hot side allowing the thermostat to lift off its seat with the thermostat cover in place?

 

[chopperguy]

Re: Johnson 130 Left Bank normal, right bank HOT!

I thought about that. On this outboard the themostat is inside the pressure relief valve. Not sure how to check this. I could remove the t-stat and replace the t-stat cover and see it it still over heats.

 

[boobie]

Re: Johnson 130 Left Bank normal, right bank HOT!

Bad thought but you could have some blockage below the p/h where hot water exits.

 

[fshrgy99]

Re: Johnson 130 Left Bank normal, right bank HOT!

any chance that the hot bank is running lean? Ant trouble with carbs lately? Maybe it is not the water flow at all. my .02

 

[ryguy1101]

Re: Johnson 130 Left Bank normal, right bank HOT!

may have missed it earlier in the thread, but have you checked inside the cooling jackets? Could you have excessive corrosion inside starboard head? I'd try running the engine without T-stats for a while to see if one of them is not working properly. Just remove the stats, springs, plastic and rubber gasket pieces and replace the thermostat housing itself for the test. It won't hurt the engine (I'm in South Florida and don't even use the thermostats for this very reason). Then you'll know for sure if its a T-stat or not. Your 12:51 post would indicate that the problem is almost definitely a T-stat issue though.

 

[chopperguy]

Re: Johnson 130 Left Bank normal, right bank HOT!

Thanks ryguy1101, I will try that today. The reason I initially replaced the thermostats is because they were corroded and stuck open, so they weren't doing anything anyway. I've suppected the t-stat /relief valve all along, that's why I bought a second new one thinking the first was bad. BTW, cooling jackets are clean and so are the holes that let the water in the back. I'll let you know what happens.

 

[bob johnson]

Re: Johnson 130 Left Bank normal, right bank HOT!

id take the t-stats out completely and run her......just to see if cooling is an issue or if it is an OVERHEAT issue... I know they sound the same, but there is a difference.

then what happens would direct me what to look at next

plus id go back and reflush with some dish degergent squirted into the garden hose before you attach it to the motor

bob

 

[emoney]

Re: Johnson 130 Left Bank normal, right bank HOT!

btw, did your compression even back out when you reinstalled the heads the 2nd time?

 

[chopperguy]

Re: Johnson 130 Left Bank normal, right bank HOT!

No 10 psi lower than the port bank. This would be a 9% difference which believe is acceptable.