Why will my boat only reach 3000 RPM in WOT?

[samocamo123]

Hi, I have an Ebbtide Montego 170 with a 3L OMC Stringer 400 (302STHRCOM) and I noticed in WOT I only reach 3000 RPM, it can't be my prop as its a 13 3/8 x 17 pitch and is what I believe to be the factory prop (its a little dinged up but not enough to make a noticeable difference). It also couldn't be gearing or outdrive as they are stock. I am thinking it could be timing as I messed with the timing when I was having some issues when I first got the boat, although I just messed with the timing until it sounded the best at idle because my engine pulley has no timing marks even though it has timing tabs, and I believe the previous owner replaced the pulley, I have a timing gun but I can't use it without a timing mark. It also makes a ticking noise right after pushing it hard for a while and then seems to go away after it sits and idles, I don't think it is overheating because I haven't noticed the temp go very high. I also don't think its a lifter because it doesn't seem to tick faster when I rev it. Could the tick have anything to do with it?

 

[Scott Danforth]

use a piston stop, determine TDC

you are probably no where near correct on the timing.

you may also be running out of fuel.

 

[alldodge]

Sounds like you just got the boat, and if this is correct then need to go thru it as Scott mentioned. Let us know what you find

 

[samocamo123]

use a piston stop, determine TDC

you are probably no where near correct on the timing.

you may also be running out of fuel.

Will a piston stop work on my engine as the sparkplugs are diagonal not vertical?

 

[alldodge]

Yes, it works with either. Keep in mind this must be done by hand (no starter)

 

[Scott Danforth]

Yes, it works with either. Keep in mind this must be done by hand (no starter)

come on, where is the fun in that.