Proper rpm @ wot merc 188 v8

[syuhas85]

Just curious what the rpm range should be on the Merc 188 302/351 v8

I'm Recently just installed a Vengeance 14 x 19P Stainless prop and SmartTabs SX(amazing) right now at WOT I'm running about 4800-5000k rpm (depends on trim) at 40 mph. now to me that's really high RPM for a 5.0L but it is a boat so I maybe wrong, If it is high what kind of pitch would you recommend going with or prop in general..

Thanks

 

[Don S]

Re: Proper rpm @ wot merc 188 v8

Just curious what the rpm range should be on the Merc 188 302/351 v8

3800 to 4200 rpm is the spec for that engine. It is a 302, not a 351.

 

[syuhas85]

Re: Proper rpm @ wot merc 188 v8

3800 to 4200 rpm is the spec for that engine. It is a 302, not a 351.

Thanks Don. and ya someone told me it was a 302/351 I did the tune up but had the wires set for a 302 but ran like hell the tech switched them over to a 351 and shes runs like a rapped ape, he said something about it has 351 heads and cam and a 302 block set up have no idea y but ya...

again thank you and if i switch to a 21p prop will this suffice the rpm problem?