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Motor Mount - problem and questions.
Situation: We have a 1958 Chris Craft with an inboard 6-cylinder engine. Manual says the engine weights about 800 lbs. To do some of the hull & rib work we took the engine out. The engine was mounted to the boat using 4 motor mounts, one on each corner. These mounts (probably like most mounts) were two plates of steel with rubber separating them. Looking at the old mounts, we decided that the back two were bad enough to replace but that the front two could be reused. So I bought two new ones and a few weeks ago we replaced the engine. The two rear mounts (where more of the weight is because the engine sets on a tilt angle) were the new mounts. The front mounts were re-used. After setting for a week (no in-water use, the engine has not even been run) the left front mount "sagged" and the rubber split from the steel. OK, that's just a bad call on our part for not replacing the front mounts. The back left mount, which was new, also came apart. On one hand I figu Well, it was probably holding almost twice the weight it should have been, so that figures. On the other hand I think: Normally one of these mounts is supposed to handle engine vibration, the torque of the engine trying to turn the prop, the thrust of prop, heat from the engine, and years of use. So two questions: #1: How are these made? Do they glue / epoxy the rubber to the steel or is it just injection molded or what? #2: Does it seem strange that a new mount would come apart under these conditions or not? Thanks, Gary |
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Motor Mount - problem and questions.
Hey Jack, Wow, I can't believe they reopened? I had purchaced boxed lots of parts when they closed. i bought boxes of fuel sending units and other similar things on ebay for resale. I'm glad to here they are back at it,I've always liked their boats. Brian K On Mon, 1 Sep 2003 20:52:40 -0400, "Gary Warner" wrote: Situation: We have a 1958 Chris Craft with an inboard 6-cylinder engine. Manual says the engine weights about 800 lbs. To do some of the hull & rib work we took the engine out. The engine was mounted to the boat using 4 motor mounts, one on each corner. These mounts (probably like most mounts) were two plates of steel with rubber separating them. Looking at the old mounts, we decided that the back two were bad enough to replace but that the front two could be reused. So I bought two new ones and a few weeks ago we replaced the engine. The two rear mounts (where more of the weight is because the engine sets on a tilt angle) were the new mounts. The front mounts were re-used. After setting for a week (no in-water use, the engine has not even been run) the left front mount "sagged" and the rubber split from the steel. OK, that's just a bad call on our part for not replacing the front mounts. The back left mount, which was new, also came apart. On one hand I figu Well, it was probably holding almost twice the weight it should have been, so that figures. On the other hand I think: Normally one of these mounts is supposed to handle engine vibration, the torque of the engine trying to turn the prop, the thrust of prop, heat from the engine, and years of use. So two questions: #1: How are these made? Do they glue / epoxy the rubber to the steel or is it just injection molded or what? #2: Does it seem strange that a new mount would come apart under these conditions or not? Thanks, Gary -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
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