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| Exhaust Flappers Removed https://www.smwebhead.com/phpBB3/viewtopic.php?f=3&t=14001 |
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| Author: | zims1993 [ Mon May 11, 2015 10:49 am ] |
| Post subject: | Exhaust Flappers Removed |
So I pulled apart the exhaust this weekend to replace the exhaust hose that sprung a leak last year and found that both exhaust flappers and all components had been removed. I'm thinking this happened when the engine was replaced in 2003 from a cracked block after the heater in the original owners storage building went out over the winter. So far I have not had any issues with them not being there, but thinking its a better piece of mind to have them. Anyone have a differing opinion about not having vs. having them? OMC 5.0 EFI Cobra Drive, btw. |
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| Author: | Graham R [ Mon May 11, 2015 10:58 am ] |
| Post subject: | Re: Exhaust Flappers Removed |
zims1993 wrote: Anyone have a differing opinion about not having vs. having them? OMC 5.0 EFI Cobra Drive, btw. Volvo Penta do; they issued a technical bulletin recommending they be removed and described the method to do it ! |
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| Author: | LouC [ Mon May 11, 2015 3:54 pm ] |
| Post subject: | Re: Exhaust Flappers Removed |
OMC never made any recommendation to remove these. And since Volvo 'adapted' the OMC transom/exhaust design in the joint venture and later models, its not surprising that they might have a different view. However, based on my experience, each boat is different and to be on the safe side I'd replace them. I'd rather gamble the OMC was right and Volvo was wrong, than to leave them off, then have to stop fast for some reason one day and have a following wave come up the Y pipe and hydrolock the engine. The only time they will cause trouble is if you have a bad overheat and they will melt and fall down the Y pipe. I had this happen and was able to get them out without too much trouble. |
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| Author: | zims1993 [ Tue May 19, 2015 2:22 pm ] |
| Post subject: | Re: Exhaust Flappers Removed |
Put all 4 new exhaust hoses and flappers in on Sunday and went for a ride. Had a small leak from the manifold to the hose when running on muffs and fixed that. Test ride on the river seemed to have no issues, did have some water in the bilge but not enough for the pump to suck up. Need to take back out and look for leak with the engine cover off... |
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