Over-heating Question/concern?

[james mcculloch]

Hi Everyone- I Changed The Head Gaskets On My 1978 Johnson 85 A Couple Months Ago. I Had A Friend Who Suppose To Have Know About These Things Help Me. We Found A Couple Of Rubber Strip's Inside The Water Passage Chambers And Not Knowing What They Were, We Took Them Out! Turn's Out They Were The Water Passage Restrictor/divertor That Suppose To Help The Flow Of The Water To Cool Off The Block. I Found This Out After The Fact Now And Dont Know How To Replace Them? I Heard It Will Only Over-heat If We Run Her Wide Open? Actually I Have Ran Her Both Idle And Wide For A Couple Minutes Without Problem. I Dont Want To Push My Luck Though Unless It Really Wont Hurt Anything? Any Suggestion Out There Would Be Appreciated. Thanks James.

 

[ezeke]

Re: Over-heating Question/concern?

It will hurt. You need to replace the diverters/deflectors in the proper places to control the flow. http://www.iboats.com/Johnson_Defle...6552934--**********.251993586--view_id.271462

You should replace the cylinder head gaskets as well.

 

[james mcculloch]

Re: Over-heating Question/concern?

Thank You Ezeke! I Looked For The Part But Did Not Know They Were Called Deflectors, So I Couldnt Find Them. Ya I Will Definatley Replace Em And The Gaskets Again. I Saw There Are 3 Diff Ones. Are They All The Same Size?? Or Is The One That The Link You Sent The Right One?? I Will Research It A Little More Before I Order Anyway. So Thanks Again And Boat On Brother!!

 

[ezeke]

Re: Over-heating Question/concern?

Yes, the OEM part number is 0322411; the aftermarket Sierra equivalent is 18-0892.