The same goes pretty much every part on a 420cc engine, they are roughly 50% smaller and can take much less abuse.ĥ. Its a common thing to blow up/burn out starters on 420s but 670s have monster starters that last for many years. Lighter Duty / Lower Quality - The 420s are much lighter duty engines and the build quality tends to be much lower than the 670 simply because of the price point they are selling them for. Our customers tell us that a 420 feels like 50% more power than stock and the 670 feels like double the 420.Ĥ. The 670s are over double the displacement of the stock engine and the power increase is dramatic, its a completely different cart and increases the carts functionality and utility significantly more than a 420. We find that many people end up switching to the larger 670cc engine within a years time, simply for the massive power increase it provides. Minor Power Increase - The 420cc is little more than 100cc larger than the factory engine and thus, the power increase is not as drastic as most people want or expect from spending $1200+ on an engine swap. (This does not apply to the new 459cc engines from Harbor Freight)ģ. Splash Lubrication - This was covered a few months back in a previous article but essentially these engines last 1/4 as long as the V-Twins on average because they don't have pressurized lubrication. In order to fix this you need to either add an external alternator or use a Starter/Generator which adds costs.Ģ. Many people will say the v-twins have weak charging systems but with 10amps of power they are 5x more powerful than the 420s and we've never had issues with batteries dying.
Insufficient Charging Output - These smaller engines have 2amp charging coils which will not keep your battery charged. The smaller engines(420-460cc) have a few major drawbacks which require alternate solutions to overcome which in turn costs you more money and more importantly, more time.ġ. Both engines will accomplish the task of repowering your golf cart and give you more power, however, there is a distinct value difference between the two which you shouldn't ignore.
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