Thought this was worth starting a new thread for. Today I installed a perfect but used 1986 OEM OMC housing. The problem was that the GLM22600 (new aftermarket housing) is designed slightly differently and lets more water through. If you look into the port that goes to the starboard manifold, you will see a "bump" on the OMC casting, clearly designed to restrict the water flow. The GLM has no such bump. At idle, the engine now goes to 140, then to 155 at 3200 rpm. I did not examine the gauge behavior carefully, but I assume it went to 160 then back to 155. (Recall at no time did the temp get above 125 d. with the GLM.)
From all the posts I received on this issue I noted the camp was evenly divided as to whether a too-cold engine should be a serious problem. Still particularly since this is a brand new engine, I feel better. I have yet to go beyond 3/4 throttle (L.T. 20 hours) but now I feel I can do this safely.
I am sure many boat owners who are using the GLM part are thrilled that their engines are running so cold, but I guess a lesson learned here is to be wary of aftermarket parts!
Comments welcome!
Frank
From all the posts I received on this issue I noted the camp was evenly divided as to whether a too-cold engine should be a serious problem. Still particularly since this is a brand new engine, I feel better. I have yet to go beyond 3/4 throttle (L.T. 20 hours) but now I feel I can do this safely.
I am sure many boat owners who are using the GLM part are thrilled that their engines are running so cold, but I guess a lesson learned here is to be wary of aftermarket parts!
Comments welcome!
Frank