1993 Johnson 15 hp Head Torque Question

[93Johnson]

Due to a lack of power in my motor recently and frequent stalling when starting I decided to replace my head gasket. Now that I am putting it back together I am looking for the torque specifications for the cylinder head bolts. I bought an online manual and I cannot find them. Much appreciated if you could provide those specs. Model J15EETB.

 

[racerone]

Was there something wrong with the head gasket ?----Torque to 160 INCH LBS.----What other trouble shooting was done if any ?

 

[93Johnson]

Was there something wrong with the head gasket ?----Torque to 160 INCH LBS.----What other trouble shooting was done if any ?

The motor hadn‘t been serviced in at least ten years and it was stalling out at low speeds coming to shore. I took it to the dealer and they adjusted the idle. They suggested changing the head gasket due to low compression. I didn’t want to pay the $350 so I took the boat out 4-5 times and it ran great. Then it started to stall at starting and had loss of power. I did another compression test and it was 50 - 50 in both cylinder. So now I have it all apart and am ready to put back together. Just need to know the torque value.

 

[93Johnson]

The motor hadn‘t been serviced in at least ten years and it was stalling out at low speeds coming to shore. I took it to the dealer and they adjusted the idle. They suggested changing the head gasket due to low compression. I didn’t want to pay the $350 so I took the boat out 4-5 times and it ran great. Then it started to stall at starting and had loss of power. I did another compression test and it was 50 - 50 in both cylinder. So now I have it all apart and am ready to put back together. Just need to know the torque value.

Also, i watched a YouTube video (

) and the mechanic suggested 20 lbs, my dealer suggested 25-27 lbs and my manual had a bolt size/thread size of 28 lbs. As someone who has never done anything mechanical I just want to know the exact torque value.

 

[racerone]

Torque to 160 inch lbs.

 

[93Johnson]

Torque to 160 inch lbs.

Here is the manual that I downloaded. My bolts are 7/16

 

[racerone]

???----Your bolts are NOT -----7/16"-----Well the wrench you use might be 7/16".-----The bolts are 5/16" mate !!!!----And the threads in the block are aluminum.

 

[93Johnson]

That makes sense. Not knowing anything (about mechanics) is the range on the table for 5/16 then between 13 and 19?

 

[racerone]

You have a wonderful opportunity to look / listen / learn.----Torque those bolts to 160 inch lbs !