NEED ADVICE: 1983 Evinrude 9.9

[racerone]

Putting a new ring on the top groove is a waste of time.----It may make compression even worse.----I have more than one of these power heads around and worked on a lot of them.----I agree remove cylinder head and inspect top of bore for wear / ridge.

 

[CaptainOfTheMinnow]

Putting a new ring on the top groove is a waste of time.----It may make compression even worse.----I have more than one of these power heads around and worked on a lot of them.----I agree remove cylinder head and inspect top of bore for wear / ridge.

Thanks I will do that. I meant should I re ring the pistons and go whole nine yards or just slap it back together after resurfacing head and inspecting the bore from top down? If I do rings would want to do them all vs only top groove..

I am more inclined to just resurface head and put back together with some new gaskets and cross fingers. What would you do sir? Allegedly low hour freshwater motor with 90 psi.

 

[racerone]

Well ---I meant to say that putting new rings in the top grooves is a mistake.-----You see I have looked at ring grooves with a 10X magnification microscope.----The ring grooves can wear out and putting new rings in them is a waste of time !!

 

[CaptainOfTheMinnow]

Well ---I meant to say that putting new rings in the top grooves is a mistake.-----You see I have looked at ring grooves with a 10X magnification microscope.----The ring grooves can wear out and putting new rings in them is a waste of time !!

Thanks for the advice. Is that to say if you were going to re ring one of these motors you would only replace lower ring On both pistons and leave top ring alone? (1 ring set for entire engine?)

 

[racerone]

Nope----The top ring and the bottom ring are totally different.------Time to look at / study what you have here !!----Sorry----I am not working on my first one of these.

 

[CaptainOfTheMinnow]

Nope----The top ring and the bottom ring are totally different.------Time to look at / study what you have here !!----Sorry----I am not working on my first one of these.

Thanks, I’ll have to take a closer look. When I pulled the pistons on existing block the rings expanded like a slinky so there wasn’t much to look at. They were pretty far gone. Appreciate the help. Hopefully slap the new to me powerhead on there with a new thermostat and head gasket and call it good!

 

[CaptainOfTheMinnow]

[No message]

 

[CaptainOfTheMinnow]

Put up a few photos of old pistons and crank if anyone wants to see. 1987 E10CUE powerhead on the way. Fingers crossed

 

[CaptainOfTheMinnow]

I just read on Leeroys Ramblings that if I install a post 87 powerhead on this 83 the cowl will not latch down because of the new thermostat location! I have an 87 on the way...can someone confirm?

QUESTION: Is possible to put 83 head (lowered thermostat) on 87 block (raised thermostat) without issues? That would allow cowl to latch but I wasn’t sure about if the head was the only difference (revised water passages for raised thermostat?) It appears to be same at first glance but don’t have the 87 in my hand yet. 87 was the year where they switched thermostat location but depending on what time of year it was made dictates which head you got. This leads me to believe same head different thermostat location.

what do you guys think?

Thanks to all.

 

[racerone]

I just test fitted an 83 cowling on an 89 model.-------It very, very nearly fits without issues.----A competent individual can modify the latch or the cowling to make it work.

 

[CaptainOfTheMinnow]

I just test fitted an 83 cowling on an 89 model.-------It very, very nearly fits without issues.----A competent individual can modify the latch or the cowling to make it work.

Thank you sir! My cowl is painted orange with the same paint on my Piper Cub. For this and obviou$ reasons would like to use existing one. Appreciate you taking the time to fit one!

 

[CaptainOfTheMinnow]

Friends, what is the best way to test a late model thermostat (1987)? Figured I’d try to test before spending $50 on a new one.. heat up in pot of water?

 

[racerone]

Does your motor warm up or run cold ?

 

[CaptainOfTheMinnow]

Does your motor warm up or run cold ?

Haven’t put powerhead back together, but figured I’d look at t stat when I had the head off for inspection. I guess I could run her first and check what you said above!

 

[CaptainOfTheMinnow]

Thanks

 

[CaptainOfTheMinnow]

Friends, got the new to me powerhead today. In process of pulling head and inspecting. Lots of carbon but I guess better ran rich than lean eh? Anyways my question: Can I replace crank seal without splitting crankcase? I think it’s just the crank key in the way but wanted to ask one of my friends here.

 

[oldboat1]

Why are you doing all that? Get a powerhead gasket and install -- run it and see what is needed, if anything.

But make sure you have a fresh impeller -- see second post, above.

 

[CaptainOfTheMinnow]

Why are you doing all that? Get a powerhead gasket and install -- run it and see what is needed, if anything.

But make sure you have a fresh impeller -- see second post, above.

Thanks for the response. I just pulled the new to me powerhead head and must admit the cylinder walls appear to be worse than my old powerhead. Not sure if I should return the powerhead and say screw it or just slap back together and see what happens. My old Cylinder walls had a flat spot but this has longitudinal scratches that can be felt with fingernail. Seller claimed 90 psi on both cylinders. What would you guys do? Perhaps I’m trying to do too much with the ol gal and should follow this mans advice. Gaskets and water pump on the way.

 

[CaptainOfTheMinnow]

Here is the new to me cylinder walls. I’ve decided to reassemble with new gasket/water pump as recommended and see where it goes!

I have a 14 day return period on the powerhead but if I take the seller at his word that cylinders are 90 psi, I will be happy with that. I was surprised to feel the scratches, but the head looks pretty clean in regards to water corrosion - not much to speak of, so that’s a plus!

Appreciate everyone’s inputs!

 

[racerone]

Absolute garbage.---Send it back.---Get your money back.----Now you know why it is some times called ----FLEA-BAY !!