looks available to me too. it for sure was a few years ago, cause mine leaked (into the bilge) and i R&Red the diaphragm with the kit. that said. i wouldn't do it again. i'm not sure what year it happened (1978 i think. s/m #3), but for sure my '75 still used an automotive type fuel pump. like in no 3rd line back to the carb so if the diaphragm does rupture, fuel goes back to the carb. this imho is a major safety issue that i have to deal with. if i had the new style mechanical fuel pump like the ones that are available now, it'd have the 3rd line back to the carb. sure would make me feel better if it did. what i have now works just dandy and meets the oem standards of the day (1975) it was mfg. but it don't meet the standards of today, which imho is a real good safety standard regarding fuel pumps... i look at my fuel pump for leakage prior to every run... if i did replace my fuel pump, i'd would replace with a new mechanical fuel pump too as i agree with this statement.
. Lots of stuff here, make sure you get the oil pressure fuel cut off switch to go with it. http://marineengineparts.com/shopsite_sc/store/html/page81.html if you have nothing to say about the question, then do not write anything please. Now I have asked this question as this is my first time in owning a Mercruiser powered boat and I want to get the good oil to my questions etc from people who know what they are talking about and who have either owned or own one of these engines i.e. 1971 Mercruiser 165hp in-line 6 GM engine with a 2-Jet Rochester Carbie The boat is a 1971 Bertram/Caribbean Commodore 6.1metre (20') Half Cabin Cruiser. Now the fuel pump on my engine is the old mechanical unit without the third return hose to the carbie as it does not have the plug in it for that. I have read most of the post's about these types of setup's in this forum OK but needed current up to date advise on it. The other thing is that I have found that when I went to change the fuel line between the pump and carbie due to it starting to perish, there was no fuel in the line at all and that got me wondering that I might have a fuelpump problem as it does take a little time for the engine to start up i.e. pump has to draw fuel up from the tank to the pump and then to the carbie then moter starts. This is why I was asking about a electric unit so as to get the fuel to the carbie fast which in turn would allow the engine to start first time ever time without flooding it etc. Now I know that some people on hear are going to write back and say - WHY DIDN'T YOU JUST SAY THAT IN THE FIRST PLACE?. Well what is wrong with just getting some idea's and points of view first? Now getting back the fuel pump I have. I have not taken it apart as yet to see if the diaphram is split etc thus causing the fuel to drain back into the tank and leaving no fuel in the lines and NO IT IS NOT DRAINING INTO THE BILGES etc. I hope I can get some good replies to all of this and not ones like - Chain puller aka SPAM etc. I am real and asking real questions here as this is a family boat and I want it to be as safe as possiable plus I am not your normal sort of first time boatie etc as I have been involved with boats all my life since I was 6 years old and that makes it 45 years both owning, dealing and working on boats both personally and professionally as crew and Skipper, I am also a member of the local Volunteer Coast Guard Flotilla here in Australia so I am extremely safety focused etc but as I said before this is the first time I have owned a Mercruiser setup and want to make sure it is setup correctly. I also have ordered and just waiting for the Water Reversal Kit to arrive and then I can install that. Thanks to the guys that let me know about that one too. Thanks to all and look forward to your replies once again. 
