Join Date: Jan 2011
Location: Va Beach
Thanked 6 Times in 6 Posts
Rep Power: 7
Engine wont rev past 1800rpm
A bit of history first...Alberg 30 with A4, rebuilt completely by Moyer in 2008. I bought the boat this spring and have had zero issues until now.
following items on boat/engine.....
.has fresh water cooling
.indigo 3 blade prop
.fuel a week maybe 2 weeks old. i used a portable 3 gallon tank...no internal tank
. Racor 110 fuel filter assy
. boat was hauled and pressure washed in Feb. prop was clean
.removed and cleaned spark arrestor..no change in performance
anyway, i have always been able to achieve 2500-2700 rpms in foward. dont really cruise there but did have to run the motor that high going through some 6ft chop....that god for the extra power! and want it!
Anyway last weekend took her out and noticed at start up she was a bit hard to start, usually fires right up. no big deal..once started she kind of surged a bit, this was unusual. After she warmed up all seemed fine. backed her out and headed out. while heading out i decided to just run her up abit to clear things out. I only using run her between 1500-1800rpm. Well at about 1/3 throttle she got to 1800 and would not go past no matter how much throttle...just kinda got that hollow sound from carb. went back to 1/3 throttle and cruised out of the channel no missing a beat at 1800 rpm with ideas running thru my head. Once I cleared the channel i tried reverse....engine reved up to 25-2700 no problem. i did this thinking maybe prop was fouled. no change went back in forward. I decided to pull the choke abit to see if maybe she was starving for fuel....at about 1/2 choke she started to die...too much fuel. choke back in and cruised at 1800 for about 10 more min and finally went sailing. On the way back in she started right up and got me home. Today i went down and looked things over...nothing obvious. pulled the plugs, all looked good a slight tan, # 4 was a bit white when conpared to other 3 but overall fine. drain fuel/water separater, there was some debris but no water.
I asked around the docks and someone asked me how dirty the bottom was? would this have an effect on engine rpm. i can see not reaching same speed if bottom was dirty but engine should rev, correct? he told me his boat(alberg 30 with A4 -2 blade prop) wont go over 16-1700 rpm ever.
i ordered a new filter for Racor...nobody in Norfolk area stocked it...
Any ideas on where to look next? is it posssible the bottom is that dirty already? water here is very dirty, cant see 1inch below waterline. i might call a diver to check things out....will be about 75 to have it cleaned..Could it be timing?
any and all ideas welcomed