Another Guy With Force 120 Issue

[Popeye_1990]

Depending on the engine I’m working on; I typically go to marine engine dot com, dial in to the model then go through their diagrams and part numbers then either buy from them or eBay-depends on $$

Thanks. We let y'all know how it's coming .I'd given up being back on water this year but if this is the issue....theres still time.
Fingers crossed

 

[puffitu]

I’m in Florida so I’m always out there

 

[las]

Ias....i sent of pics and stuff. Like to see what you think if you get a chance

Hmmm I don't think it's caused by a lean condition anymore. The color on the deposit on the pistons look fairly similar.
I can't see any immediate failure on the head gasket, but it's hard to tell from pictures. The fact you had an oiled bolt and corresponding wetting at roughly the same spot on the gasket could indicate a beginning gasket failure.
Combustion pressure could have been allowed to seep and somewhat aerate the number 4 barrel making it run a little bit hotter.
It's all guesswork, but educating none the less! And now you know the condition of pistons, barrels, cooling jackets and off course your new head gasket. Not bad really.

 

[Popeye_1990]

Hmmm I don't think it's caused by a lean condition anymore. The color on the deposit on the pistons look fairly similar.
I can't see any immediate failure on the head gasket, but it's hard to tell from pictures. The fact you had an oiled bolt and corresponding wetting at roughly the same spot on the gasket could indicate a beginning gasket failure.
Combustion pressure could have been allowed to seep and somewhat aerate the number 4 barrel making it run a little bit hotter.
It's all guesswork, but educating none the less! And now you know the condition of pistons, barrels, cooling jackets and off course your new head gasket. Not bad really.

Thanks for checking you 2 men have helped this old man a lot. I appreciate whether it fixes the issue or not. Will update y'all when I find gaskets and put back together...

 

[Popeye_1990]

I’m in Florida so I’m always out there

 

[Popeye_1990]

Greetings all
Parts all clean ready to go back on. Apparently there is no gasket between cylinder head and cover. Can y'all recommend what sealant for head? Uneasy about it cause it's a marine engine.

 

[The Force power]

Greetings all
Parts all clean ready to go back on. Apparently there is no gasket between cylinder head and cover. Can y'all recommend what sealant for head? Uneasy about it cause it's a marine engine.

gasket maker 518 permatex

 

[Popeye_1990]

gasket maker 518 permatex

Greetings
Well truly am befuddled now. Put everything back together. Started fine but pumped zero water. Overheated almost immediately. Double checked that I'd put thermo back correct and it was. Was pumping water beautifully before removed head. Water never made it to back of head or from tell tale. Any ideas. Seems idiot proof.

 

[Popeye_1990]

Greetings
Well truly am befuddled now. Put everything back together. Started fine but pumped zero water. Overheated almost immediately. Double checked that I'd put thermo back correct and it was. Was pumping water beautifully before removed head. Water never made it to back of head or from tell tale. Any ideas. Seems idiot proof.

It was on double ears from garden hose. Done before.

 

[The Force power]

It was on double ears from garden hose. Done before.

Is the head-gasket replacement exactly the same?
Did you remove the LU and put it back on? (pick up tube not aligned with pump)
Condition of impeller?

 

[puffitu]

I’d say water tube without being there through reassembly process

 

[Popeye_1990]

I’d say water tube without being there through reassembly process

Yes. Exact match on the gasket and no did not remove lower unit.. The motor sat a week with head off and motor was trimmed down as low as it would go. Is it possible that all water has drain or evaporated to point that it would need to be primed?

 

[puffitu]

Without being an expert on this; if I were in this predicament, I wouldn’t hesitate to attach a water hose to the water tube while having the lower off and see if the water will find its way to the pee hole. And maybe even rig up something to test the lower unit water pumping ability just to rule that out as well; Bering careful not to wreck the driveshaft splines of course. I’m sure others will chime in with their diagnostic procedures-good luck

 

[The Force power]

Yes. Exact match on the gasket and no did not remove lower unit.. The motor sat a week with head off and motor was trimmed down as low as it would go. Is it possible that all water has drain or evaporated to point that it would need to be primed?

The pressure of water through coming out of the ear should be high enough to push the water to the pump and with the engine running it should reach the head
I would drop the LU and see if there's any blockage & inspect/replace the Impeller
and as pullitu already mentioned; slide a garden hose onto the pick-up tube and force water up & check if it come out the Tell-tail.
IF... you are trying in a tank of water; make sure the LU is at least 4 inches above the cavity-plate in the water. The pump is NOT self priming!

 

[jerryjerry05]

The pressure from the hose isn't strong enough to push water past the pump and up to the head/thermo.
Hook the hose to the tube and turn it on, shouldn't need that much pressure to make water come up to the thermo.
If it overheated almost immediately?? then maybe the sending unit is grounded out?
Should take a few minutes for it to heat up???

 

[Popeye_1990]

The pressure from the hose isn't strong enough to push water past the pump and up to the head/thermo.
Hook the hose to the tube and turn it on, shouldn't need that much pressure to make water come up to the thermo.
If it overheated almost immediately?? then maybe the sending unit is grounded out?
Should take a few minutes for it to heat up???

Thanks. Will make attempt after work today after I put back together again. I may attempt running a stream of water backwards from the tell tale first. Should that not verify clear passages if it comes out water intake vents at bottom of engime?

 

[The Force power]

Thanks. Will make attempt after work today after I put back together again. I may attempt running a stream of water backwards from the tell tale first. Should that not verify clear passages if it comes out water intake vents at bottom of engime?

theoretically yes, but not it will not tell you if you have a (partial) restriction.
The hose on tube method is more accurate!

 

[puffitu]

Just take lower off not that big of a deal. Takes me all about 10 minutes while she holds my beer; then hook a hose up and turn the spigot, retrieve beer and watch

 

[The Force power]

There's a hidden bolt under the exhaust-snout, remove that first & followed by one from each side alternating to prevent binding-up.
you may have to tap it to come loose & be ready they're not light

 

[puffitu]

Ratchet strap it snug not tight so when it slides lose you can control the fall. Install with same ratchet strap to help bear the weight. I never had that hidden bolt on mine but did see where it may have been at one point lol