60 hp force will not maintain high rpm under load

[greggrant]

I have replaced fuel tank, all line and primer bulb, fuel pump diaphram and torn the carbs apart to cleangood. Engine runs fine when in nuetral. When the gear is engaged I can open it up and it will take off until I begin to plane then the engine will bog down and go into a stall. If I go back to nuetral and reve the engine I can go for it again but with the same resulets. i can low power all over the lake all day without a problem. Where to I look now, I know this has go to be easy. This motor runs fine mechanically at times then goes to hell other times. tank is well vented.

 

[steelespike]

Re: 60 hp force will not maintain high rpm under load

Take the line apart between the pump and the<br />carb carefully check for good strong pulse from pump.Be sure tank is venting properely.Be sure all fittings and connectors are tight and functioning correctly.<br /> How does it respond if you push the choke <br />when its doging out?

 

[dstuard]

Re: 60 hp force will not maintain high rpm under load

Do you get good rpm's when you first take off and then a bog or do the rpm's stay below 300o the whole time?

 

[greggrant]

Re: 60 hp force will not maintain high rpm under load

I have taken it all apart and craked to see fuel spitting out of the line at the carbs a pretty strong pulse, tank is vented and all fittings are tight. Have not tried to choke it while under power but in nuetral I tried it once at full throttle and it stalled. <br /><br />I get good RPMs when i first take off then a bog.<br /><br />My plugs have been looking wet and oily. Am mixing at 50:1 or slightly less. The plugs are only a couple of hours old and were champion L76V's, the book says to use UL18V's which I just put in. Maybe I'm fouling from wrong plug?? Looks identical to what was in there.

 

[sony2001]

Re: 60 hp force will not maintain high rpm under load

Forces love the L76V's.