Preditor 670 repower for my MAX 2......

[62saab]

Hi All-

I’m very interested in repowering with the Preditor 670. I have been reading any/all write-ups where that engine has been installed-air boats,off-road vehicles,or whatever.
One obstacle to overcome is the relatively low use time logged before the owner ‘publishes’ his/her review of the engine;i.e.,no high hours/long term use reports available yet.
Another hindrance is the complete lack of technical details shared about the installation-it isn’t a ‘drop in-even I know this. So those who install this engine should be doing a (much) better job of sharing the details of that project.

I don’t particularly like Chinese products-they deserve the bad reputation they have generated for the most part-however,that said,much of their poor product blame goes to their American clients who spec the product for maximum profit and nothing else. Even when the proper materials are used with sound designs,Chinese QC is still inconsistent. However,things are improving.

I believe that the Preditor 670 is a decent engine worthy of use ,provided it performs as advertised and provides several hundred hours of service when properly maintained .

My MAX 2 has less than 40 hours use total time,and is powered by the basic B&S 14 hp V-twin.I may sell the MAX this spring,if I do,I don’t believe that the Preditor 670 re-power will negatively affect the sale or selling price….

So,all of that said, I would like to hear from anyone having used the 670 in any application;their experiences would be extremely helpful…….

Sam in IN

[dave phelps]

I have about 20 hours on mine in an attex and it’s been good so far. Here’s my issues with them. Charging system sucks so I made a bracket to mount an alternator running off a belt pulley and run a 35 amp alternator for my charging system. And also mine is very cold blooded and needs a lil more fuel. That project is gonna happen soon. Other than that I’m happy with it. Governor is bypassed and it will run 33 mph wide open. Plenty of power too

[Toys4Me]

2 words "DO IT". We have been running predators for years and never had an issue. Like dave said they are a little cold blooded. This is easily fixed with rejetting them. These motors love to breathe. They really come alive when you open up the exhaust and give them the right fuel mixture. I haven't really had an issue with lack of charging as I dont run alot of accessories and all the lights I have are LED. Many people are afraid of removing the governor, we dont have a single predator with the governor still functioning.

[dave phelps]

2 words "DO IT". We have been running predators for years and never had an issue. Like dave said they are a little cold blooded. This is easily fixed with rejetting them. These motors love to breathe. They really come alive when you open up the exhaust and give them the right fuel mixture. I haven't really had an issue with lack of charging as I dont run alot of accessories and all the lights I have are LED. Many people are afraid of removing the governor, we dont have a single predator with the governor still functioning.

LOLOL The governor bandits you guys are!! I like it!!

[Noel Woods]

Yep, remove the governor, add the one wire alternator, and maybe a $12 low pressure electric fuel pump, and you'll have a nice package.

[Chiefdiesel]

I totally agree with the others...DO IT! I love mine. It is cold blooded (so are my Kawasaki engines) so just keep the choke on longer. I have rejetted, 4600 rpm bracket, K&N cone filter and GM one wire alternator. Check out Performance 670.com.

[dave phelps]

I totally agree with the others...DO IT! I love mine. It is cold blooded (so are my Kawasaki engines) so just keep the choke on longer. I have rejetted, 4600 rpm bracket, K&N cone filter and GM one wire alternator. Check out Performance 670.com.

4600 rpm bracket?? can you tell me what that is please???

[Toys4Me]

https://www.performance670.com/product-detail/rpm-bracket

I'll just stick with bypassing it.

[eddieb1965]

Bypassing the governor will not yield any more power,It will give slightly more mph when readjusted to increased rpms.

[dave phelps]

Bypassing the governor will not yield any more power,It will give slightly more mph when readjusted to increased rpms.

I didn’t bypass the governor,I put a small rod between throttle and governor. No more spring. And it does turn more rpms and runs 7 mph faster but I don’t hold wide open long.

[dave phelps]

https://www.performance670.com/produ...il/rpm-bracket

I'll just stick with bypassing it.

Ya. Me too. You guys trained us well on these motors.
Thanks

[62saab]

Thank you all for your replies. Those,plus all of the others that I've read elsewhere are generally very positive and encouraging.
Regarding the MAX 2 platform,what then are all of the mods required for a 670 installation ?

I would prefer not to have to alter anything to the point that the original B&S engine couldn't be re-installed,but doing so isn't at all a show stopper,given the performance increase. I won't mod the 670 other than to re-jet for the lean tendency mentioned. I've read elsewhere that between 2 to 4 hours initial break-in running is recommended,as are frequent oil changes every 30 hours.

I'm looking forward to doing this upgrade.

[62saab]

This thread suddenly went dead- c'mon boys,you all were quick to respond in favor of the Predator repower,did you 'forget' how the installation was done,or would prefer not to share the secret details ??

[ARGOJIM]

This thread suddenly went dead- c'mon boys,you all were quick to respond in favor of the Predator repower,did you 'forget' how the installation was done,or would prefer not to share the secret details ??

Measure, align, affix, re measure, re align, reaffix, remove key switch box, adjoin wires, reroute cables, alter breather hose, alter exhaust. Basically.