mercruiser bogs above 3000 rpm

[wayneman420]

i have a 18 ft sea ray w/ a 130 mercruiser . it runs great from idle to about 2700 rpm. then after about 5-10 second after reaching 3000 rpm or more it acts like its running out of gas. i back off throttle for a few minutes and accellerate againd does same thing otherwise runs excellant under 2500 rpm all day long. just installed new fuel water seperater and completely cleaned carb. any helpful hints would be greatly appreciated

 

[tec_dude1987]

Re: mercruiser bogs above 3000 rpm

Hi, it sounds like we are having the same problem. We have had a few people suggest a couple things. So far nothing has worked. You can see ours at http://www.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=24;t=006330 If you find out what is wrong could you email me at tec_dude@msn.com <br />Thanks

 

[pine island fred]

Re: mercruiser bogs above 3000 rpm

see chaparrel max 3200 rpm maby that will help. ref finger filter in fuel tube fred.

 

[pine island fred]

Re: mercruiser bogs above 3000 rpm

correction, see volvo penta 2700 rpm, and reference to finger filter. fred

 

[wayneman420]

Re: mercruiser bogs above 3000 rpm

thanks for reply is there a filter also in fuel pump? heard it was headache to changs would it be easier to just change fuel pump. also guy i bought boat from said there was water in tank said he removed it . im getting little to no water in filter now and have replaced the 10 gallons i burned up w/ 10 more gallons of premium<br />i can go from idle to 4500 rpm with no hesitation but after 10 -15 seconds it acts like its missing or starving for fuel. could pick up in tank be restricted? hard to have fun tubing at 2700 rpm which is where it seems to top out at b 4 stuttering occurs . thanks

 

[wayneman420]

Re: mercruiser bogs above 3000 rpm

oh by the way boat is 1983 engine is 1993

 

[pine island fred]

Re: mercruiser bogs above 3000 rpm

my friends rochester carb has a filter in the float bowl at the fuel inlet. tube goes into a big copper nut screwed into the carb. remove the nut and there should be a paper or bronze filter . worth checking fred

 

[wayneman420]

Re: mercruiser bogs above 3000 rpm

checked bronze filter alot during operation of boat finding little particles of junk sometimes shouldnt be enought to make boat act up like it is<br />last few times checking that filter it checked out ok im thinking pick-up screen in tank or filter in fuel pump taking break from boat right now before i take a chainsaw to it.any more help would be appreciated though

 

[pine island fred]

Re: mercruiser bogs above 3000 rpm

that misterious screen in the fuel pick up line can cause a lot of trouble, lots of people dont know it is there. fred

 

[wayneman420]

Re: mercruiser bogs above 3000 rpm

thanks fred checked it its clean now what?

 

[FreeBeeTony]

Re: mercruiser bogs above 3000 rpm

What about the pump itself? Maybe the fuel pump is defective?

 

[K Hultgre]

Re: mercruiser bogs above 3000 rpm

Have you tried a external tank to narrow down the search. <br />Is the tank venting properly,<br />sufficient fuel pressure, <br />float level set too low?

 

[wayneman420]

Re: mercruiser bogs above 3000 rpm

thanks for new ideas tony and kevin friend suggested the same about the external tank just havent had time yet to do. fuel pump is something worth checking out to thanks again