2 side caps

[spanishmak]

this is a 1979 200 hp johnson,can anybody tell me what these caps are for and what is under them,because when I run the motor on the hose water leaks out from all around that cap thanx.

 

[RadarRick]

Re: 2 side caps

Here's a diagram that I think is your motor. http://www.boats.net/parts/search/BRP/JOHNSON/1979/200TL79A 1979/EXHAUST HOUSING/parts.html

It looks like there are rubber mounts under those caps - part # 18. The lower swivel bracket bolts into those rubber mounts.

Water does flow down through exhaust housing, but I don't know if it's normal to have some water coming out around the caps. does water come out of the tell-tale as well?

 

[nymack66]

Re: 2 side caps

Correct its your lower engine mounts, corrosion is often found in this area due to saltwater lodges itself in this area and corrodes through to the exhaust housing.
Chances are your mounts will need replacement, check ebay. You can used JB Weld to seal the holes..

 

[F_R]

Re: 2 side caps

I think you are going to find that there are drain holes behind those mounts. Water that escapes from the water pump comes out of the drain holes. If it didn't drain, the water would fill clear up to the top of the drive shaft tube and get into the engine through the lower crankshaft seal.

In other words, it is normal for water to come out there. It was made that way on purpose.

 

[1946Zephyr]

Re: 2 side caps

it would be a good idea to make sure all the little drain holes on the lower unit are clear as well. They often times clog up and if salt water sits in there, then it will eat the cavities out and make a real mess. If water sits in there over the winter, then it will freeze and bust the lower unit.