What do you mean by crapped out. Did it stop or do you mean it just could'nt get it up (to the RPM that is). I have a 1972 SS with 318 Chrysler's and had such a problem a few years ago. I forget which side it was but the RPM just would not go beyond 2000RPM or so. It was an intermmitent problem. We tried adjusting the timing but still no go. I forget the exact details but my mechanic at the time said it was the timing chain and it was old and sloppy causing it to not advance/retard properly. Something like that. Needless to say, before I thought about it more and could intervene, they had the front end off the motor and a big bill to follow. Guess what, it still didn't work properly so we swapped the distributor from one engine to the other as a test and it showed the old distributor needed replacing. I'm no mechanic but try the easier stuff first.
Mike Polaris ----- Original Message ----- From: Seattle Chris <[email protected]> Date: Monday, October 18, 2010 10:40 am Subject: [UnifliteWorld] Re: cruising rpm? To: UnifliteWorld <[email protected]> > I'd like to resurect this post. Yesterday was an unbelieveably nice > day in Seattle, so I took my 32' SS out to Lake Washington. As I > exited the Montake Cut and into Lake Washington, I powered up > the twin > 350's up trying to get on plane. The port side engine crapped out > somewhere in between the 2600-3000 range - and I never did get the > hull on plane. it didn't overheat or sputter - just quit. > > So I shut it down and turned tail back to Lake Union. I let it rest > for about 10 mintures the it eventually powered back up - with no > problems. > So my two questions are: > 1) What's the target RPM to plane > 2) Any Ideas on diagnosing the shut down? > > > On Aug 31, 10:55 am, waterguy <[email protected]> wrote: > > It's generally accepted that 75% to 80% of rated max rpm is > about all > > you want for a cruise RPM. You'll need to find the max rpm in your > > manual or on a decal on the motor. Small-block Chevrolets in marine > > use are usually max-rated at around 4,500 RPM, 75% of that is 3375; > > 80% is 3,6000. On boats I've had with the small-blocks, 3,000 seems > > to be a sweet spot for those engines. > > -- > You received this message because you are subscribed to the > Google Groups "UnifliteWorld" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected] more options, > visit this group at > http://groups.google.com/group/unifliteworld?hl=en. > Mike Matich -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en.
