'95 115 Mercury sluggis to plane but then runs well

[Jack's pawpaw]

Motor runs well but from idle it seems to loose power until it finally does plane then it runs well. Any ideas?

 

[racerone]

Re: '95 115 Mercury sluggis to plane but then runs well

How long have owned the motor ??----Is this something that developed suddenly ?----Start with a compression test.----Then check to make sure there is strong spark on each cylinder.

 

[quicktach]

Re: '95 115 Mercury sluggis to plane but then runs well

On increasing speed, do you get any hesitating or vibrating like it's having trouble getting up to plane - and then it seems to kick in as it get's near plane? All your fuel filters clean? Fresh gas and oil ? Motor trimmed OK ?

 

[Texasmark]

Re: '95 115 Mercury sluggis to plane but then runs well

Seems you are talking about a sloppy hole shot. Considering that is the highest stress on the engine then everything has to be in tip top shape to be successful. So, as others have stated, walk through the engine and all if you need to and then ask yourself if the rig ever ran correctly meaning it was "setup" and "propped" correctly.

I like to use the paradigm of a chain saw:

1. With the engine at idle, place the chain on a log. Goose it. Record results.

2. Lift chain off log, goose it to full rpm, hold it, and then contact the log. Record results.

3. Compare results.

4. Both are 2 strokers and both like to run, not bog down, aka hole shot.

Once you ensure that the engine and all is up to par, then look at your setup...engine to boat relationship, and then your prop. Props do make a whopping difference in performance and if you get that far and don't know what to do, come back with some numbers so that we can help you with that.

Numbers like what are you running, weight, length, hull shape, engine size, gear ratio, prop dia-pitch-blades-material, WOT rpms, rated rpms sort of things.

Mark